Citrix, processes and memory usage

[MasterPlan1]

I've got an annoying issue whereby we're setting up a system and this program which is currently using 1.7Gb of memory it generates large ammounts of data into a report. Now, when it hits the 1.7Gb mark, it fails, is there any limits as to how much memory (phys\virtual) that a process can use? I'm thinking not, as I'm sure I've seen exchange eating 2gb, and likewise with SQL... But I'm getting **** on from the powers that be, and me moaning that my servers\citrix are causing this issue.

Also, to clarify, Citrix is essentially just a pretty front end for what is at the end of it all, RDP? So, running this app is just like running it on the server?

 

[MasterPlan1]

Thanks, this may have solved my problem. The software is a small company that wrote it, and we're the biggest company that they've ever worked with and we're migrating onto this new system from an already large system which is dated (but this new one can interface with some other software we use) so I'm not entirely sure that it will run with large address awareness and I don't think it's 64bit..