Application Abends when it gets to 2GB of memory used

[Roy]

I am using an application that is running on a 4 CPU 4.5GB
RAM server.

When the application starts up, it takes up 1GB of
Memory. As each user signs on, it starts consuming more
memory. (No problem)

However, once the user base gets to where the application
is using 2GB of Memory, it abends.

How should I approach te Software Vendor?
1) I do not think this is Windows related?
2) Is this a 16 bit vs 32 bit programming deficiency?
3) Could this be a stack overflow stituation?
4) What else do I need to help them with?

Any thoughts suggestions or opinions are greatly
appreciated.

 

[Bill]

Try adding a switch to the BOOT.INI file. WIll look
similar to this (funny word wrap, use care!):
[boot loader]
timeout=5
default=multi(0)disk(0)rdisk(0)partition(2)\WINNT
[operating systems]
multi(0)disk(0)rdisk(0)partition(2)\WINNT="Microsoft
Windows 2000 Advanced Server" /fastdetect /3GB

You can read more about it:
http://msdn.microsoft.com/library/default.asp?
url=/library/en-us/ddtools/hh/ddtools/bootini_1fcj.asp