PowerWindows for Linux

AppGen PowerWindows for Linux is an
integrated suite of business applications for small to mid-sized
Linux-based businesses. If you purchased their $9.95 US demo
advertised in Linux Journal and elsewhere a
while back, you may want to give it another look, as AppGen has
significantly improved the Java runtime client. In this review I'm
going to cover the installation of the provided demo application
and discuss the potential advantages PowerWindows could provide you
as an established or aspiring Linux consultant/VAR.The PackageAppGen PowerWindows for Linux includes a CD-ROM, a one-page
install sheet and three manuals: Installing and
Configuring the Applications, Operator
Orientation and Using the
Applications.My package was missing the first manual, so I contacted
AppGen by e-mail, and they shipped out both this manual and an
additional manual on open database connectivity (ODBC).Installing and Configuring the
Applications covers installation of the client/server
installations for UNIX, Windows NT and Windows PC+.The PC+ version of the software is a Microsoft Windows-based
version that can run as standalone, peer-to-peer or
client/server.Installation instructions are fairly brief, particularly the
set on UNIX installation. The demo version I'm using is slightly
different than the full package, so I couldn't really tell if the
install routine for the full package went as smoothly as the
instructions imply. I'll detail the demo install below.After installing the software, you will need to create a
company. A demo company and data are provided, but you will need to
go through and set things up for your, or your client's, company.
Make no mistake, this is a big project. You need to make a lot of
decisions on how you want things set up, and it's much easier and
better to do this work up front than to go back and try to make
changes once you're already using the system. The second chapter of
the manual provides about 35 pages of instructions detailing the
necessary steps to set up each module and how the respective
modules will interface with each other. If you are setting up the
package for a client, you should get all the affected departments
involved in the process so the system can be set up in a manner
most useful for everyone.The third chapter provides technical information for system
administrators. This information includes the AppGen data files
structures, environment variables that effect the display of
currency as well as date/time and database utilities for
maintaining and repairing database files.Operator Orientation takes you through
the three different interfaces available: character-based GUI,
client/server GUI and PC+. The PC+ interface instruction is only
available with the PC+, peer-to-peer product.For both of the GUI interfaces, all the instructional
material assumes you are running a Microsoft Windows product. There
is no mention of the Linux Java GUI or screenshots. The
character-based interface is targeted for use with what they refer
to as "low-cost" dumb terminals, but it can be used at the Linux
console or in an xterm. (I don't know if you've priced dumb
terminals lately, but with the plummeting price of PCs and with
thin-client machines, these things aren't so cheap anymore.) I
think I'd prefer to go with a diskless GUI client machine, like the
one the LTSP project allows you to set up
(www.ltsp.org).Using the Applications gives an overview
of the features for each application of the program, a few pages on
the concepts involved, a flow diagram and text of how the
application is tied together, as well as describes how it
interconnects with the other package applications. Finally, it
includes a few pages on typical schedules and procedures for the
application you would modify based on your business practices. The
applications include accounts receivable, accounts payable, general
ledger, payroll processing, billing, bank reconciliation, sales
order processing, inventory control, purchase order processing, job
cost tracking and bill of materials (BOM).The manual warns you it does not intend to teach accounting,
manufacturing or distribution concepts, and this information is
best learned elsewhere.The ODBC manual describes the theory and installation of the
AppGen ODBC server/driver. AppGen uses a two-tier setup with the
UNIX-side ODBC server running on the AppGen server machine and a
client-side ODBC driver that works in conjunction with the
Microsoft ODBC driver manager to interface with any ODBC-aware
Windows client software, such as Microsoft Access or Microsoft
Query. If you are setting up the system for a client using
primarily Microsoft-based desktop machines, this may be a good
option to enhance the functionality of the product by allowing
common desktop applications to pull up custom reports or
spreadsheets for data analysis. I've used a similar approach in our
material requirements planning (MRP) system at work, which is
driven by OpenIngres, and it has eliminated a lot of manual data
entry for folks wanting to manipulate or analyze system data
outside of the system.Demo InstallationAs root I mounted /dev/cdrom, and as the "Quick Start" sheet
instructed I ran the setup program on the CD
(Setup.sh). I was then asked for
my initials, my desktop environment (GNOME or KDE) and the install
directory. I opted for /opt/appgen rather than the default
/usr/appgen. The CD has GNOME and KDE desktop links that point to a
Java-based install (gojava), but
that install fails on my system (Mandrake 6.0--more on this
later).The install failed upon creating the KDE link:

Setting up KDE ...
ln: cannot create symbolic link
´/opt/kde/share/applnk/Applications´
to ´/root/Desktop/PowerWindows.kdelnk´:
No such file or directory sh:
/opt/kde/bin/kfmclient: No such file or
directory Refresh Desktop
failed. You can do it manually later.
You can remove the cdrom now.
/mnt/cdrom/Setup.sh: line 1:  893 Broken pipe   dd
if=/mnt/cdrom/zAG_INIT        894 Done          | sh

I got around this by looking at
/root/Desktop/PowerWindows.kdelink and seeing it was just a call to
/opt/appgen/autoag:

[root@moe /root]# /opt/appgen/autoag
[root@moe /root]#
/opt/appgen/java/jre1.3/bin/i386/native_threads/java:
error in loading shared libraries:
/opt/appgen/java/jre1.3/lib/i386/native_threads/libhpi.so: symbol
sem_init, version GLIBC_2.1 not defined in file
libpthread.so.0 with link time reference

Hmm--not off to a good start. The README on the CD mentions
the installation has been tested on Caldera eDesktop 2.4, Caldera
eServer 2.3 and Red Hat 6.2 with the GNOME Desktop, and it should
work equally well with other "brands" of Linux. I do have the
required glibc v2.1 on my Mandrake system, but it doesn't seem that
the included Java Runtime Environment (JRE) wants to work for
me.I did some more looking around and saw the AppGen executable
in /opt/appgen/bin, so I modified
autoag to call it instead of the
Java client:

. /opt/appgen/.profile
#appgenjava
appgen

This at least got me into the text-based interface (see
Figure 1).Figure 1. The PowerWindows
Text-Based InterfaceDetermined to get the GUI working, I decided to try
installation on SuSE 7.0. The README warned that the install
expects the CD to be mounted in /mnt/cdrom, and since SuSE puts it
in /cdrom, I made a symlink:

cd /mnt/cdrom
ln -s /cdrom cdrom

As root running X, I mounted the CD and clicked on the setup
program. This time the GUI install worked (see Figure 2). I again
chose /opt/appgen and proceeded with the install. When the install
was finished, an AppGen icon was placed on the desktop, and I was
informed the application was ready to run. I shut down X as root,
then ran X as user "stew", and PowerWindows showed up as an
application on my KDE menus (see Figure 3).Figure 2. Success with the GUI
Install!Figure 3. The PowerWindows
Master MenuThe GUI has a modern feel to it. It allows you to open
separate windows for the various applications, so you can look at a
financial at the same time you are reviewing a BOM, for instance.
This has been an issue at times with our text-based system at work,
as it requires opening another xterm and session, consuming another
license for the software which may block another user from
accessing the system. One minor annoyance: if you resize the
window, the child windows that may open within it do not track with
the parent window, and you may find you have information outside of
scrollable reach. Your best bet is probably to leave the windows at
their default size. I was running a 1024 x 768 desktop on SuSE, and
there was not enough room to have two windows fully visible at one
time, although they could be quickly accessed with Alt-Tab. It
should be noted that within each application window you also have
the ability to open multiple child windows. In addition to the
application window, they are displayed on a bottom taskbar, as in
Win9X (see Figure 4). If you try to exit the application without
closing the child windows, you are warned that you must close them
prior to exiting. Responsiveness of the GUI is a little slow on a
P166 machine with 80MB RAM running X and KDE. The README recommends
128MB of RAM. I also found performance to be less than optimal
displaying the GUI client on another machine running X from a
Telnet session on the host machine. Perhaps that will improve as
the Linux GUI matures.Figure 4. PowerWindows Parent and
Child Windows with TaskbarReportingPowerWindows has most of the typical reports you would want
to see from this type of application, aging reports, BOM, vendor
lists, payroll reports, etc. The reports are nothing fancy, but
they do display the data nicely. The demo version I had for review
did not allow actual printing, so I was unable to see how they
looked on paper.Help SystemThe help system uses HTML, a plus in my book. I did have to
add an environment variable, AGBROWSER, to
/opt/appgen/.profile:AGBROWSER=/usr/X11R6/bin/netscape;export
AGBROWSEROnce this was done, the on-line help came up in Netscape as
expected. This should probably be wrapped in one of the Netscape
wrapper scripts; otherwise it tries to launch another instance of
Netscape when one is already running, instead of opening another
window. Again, the demo version does not have extensive on-line
help. There is also context-sensitive help when you are in a field
on a data screen. Clicking on the "?" icon opens another window
with a description of the field in question and possible
options.PowerWindows is much like the MRP system we use at work,
although not quite as full featured. You do have the basic things
needed to run a business: accounting, payroll, inventory control,
job cost tracking and BOM. In the text-based client, you maneuver
with the arrow keys, Tab, function keys, and the Return or Enter
key. F1 or the word "End" backs you out of menus and screens (it
would be nice to map this to the "End" key).There were a couple of occasions where I got into a screen
and was unable to get back out, and in one case I had to kill the
session from another terminal. I can envision having to do this a
lot in a manufacturing environment. The GUI client responds to the
same keystrokes, as well as to the mouse, and it has icons to pull
up Help, the Quick Menu and a screen dump.Multiuser EnvironmentAs you would expect from this type of product, PowerWindows
keeps track of who is accessing/modifying records and prevents two
people from making changes at the same time. The second user trying
to access the data is informed the record has already been opened
by the first user. The second user is then offered the opportunity
to open the record as read-only. The system does not notify you
when the record again becomes available for editing.Data Entry FeaturesPowerWindows uses a feature it calls Cross-Reference. In any
screen dealing with codes (customer code, job code, etc.), you can
type the first three letters of any word in the name and a pop-up
will appear with the possible choices. You can also press F8 to get
a list of choices.ConclusionAppGen PowerWindows is not a package you'll have up and
running in an afternoon. It's a serious business-class package, and
as such you will need to do some planning and involve the whole
organization to get it set up and running. If you're a Linux
consultant or VAR, PowerWindows may be a great avenue to expanding
your business base. I chatted by e-mail with an AppGen VAR who told
me AppGen requires all of their VARs to attend training courses on
the software, and they also release source to their VARs.
Consequently, there are a lot of custom add-ons and modifications
in circulation within the AppGen VAR community. Some of these
add-ons have expanded the package into areas such as MRP, POS and
medical records, as well as native-language versions for those of
you working with languages other than English. A single-user
installation can run $1,500--2,500 US, while a 16-seat license can
go for as much as $15,000 US. Retail pricing is set by the VARs.
While this may sound like a lot of money to us free-software folks,
it is pretty much in line with other applications of its
class.AppGen also provides multiple levels of VAR support,
including training, help desk support, custom programming and sales
support materials for advertising and trade shows. For those of you
looking at getting started with AppGen development in Linux without
dropping a lot of money, AppGen offers the Linux BAG (Business
Applications Generator), a subset of their development package, at
$99 US or $39 US for students.As mentioned, I had a little trouble with the demo install on
my older Mandrake distribution. It would have been nice if AppGen
had included instructions or had enhanced the autoag script to fall
back to text-based operation if the Java runtime failed. In
addition, I'd like to see the documentation focus a little more on
the Linux/UNIX side of things, or give equal coverage, at least.
Those complaints aside, AppGen PowerWindows looks to be a solid
offering and a welcome addition to the Linux application base. If
you're looking for a Linux-based business solution or are
interested in exploring opportunities in the VAR channel, it may
pay to give PowerWindows a look.The Good/The BadStew Benedict is a systems
administrator for an automotive manufacturer in Cleveland, Ohio. He
also is a freelance consultant, running AYS Enterprises and
specializing in printed circuit design, database solutions and
utilizing Linux as a low-cost alternative to commercial operating
systems and software. Stew enjoys time with his wife, daughter and
two dogs at his future (not too much longer) retirement home
overlooking Norris Lake in the foothills of the Smokies in
Tennessee.

email: ljeditors@ssc.com