Thanks for your response.

It's not a database as such; - it's using its own proprietary data base system. The app is running locally on a PC, however the data files have been moved from the local server to the core, which is Windows 2003 server. We already have a connectivity directive to this server and it looks like powerbuider's using cifs for opening the files. However, it's very, very slow.

What version of WAAS are you using? Looks like less then 4.1

Check if SMB (digital)signing is required. If so, turn it off at server and client under local security policies.

Sounds like CIFS is not working properly. Let me know version you are running, and I will send you files services quickstart guide

Attached 4.0.13 files services quickstart

and cifs verify doc

Thanks for the files..Everything checks out OK. When I am doing sh cifs s l, I am seeing the session. However, the performance is still very slow. I am wondering if it's something specific to Powerbuilder. From what I understand, this program builds an app on the fly, using modules in different libraries, similar to what a compiler does when it creates a load module. I have ascertained all the libraries are in the same folder on the file server, however do not know where the latency is coming from. btw, we're running 4.0.19.

Thanks again..