Bad hub/switch with numerous collisions? I have better results with switches. Although the EXE will run in the local memory, dragging an EXE across the network could be a (small) factor as well. Is it possible to test using a local install of the EXE with the data still on the server?

>>Bandwith is one. Locking contentions? I assume queries are optimized (Rushmore for DBF, proper indexes for SQL Server, etc.)
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>As much as we know for now they seem to be.
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>>Does the data server have enough power? Memory, CPU consumption?
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>Networking guy says it does. What's a good configuration?
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>>Heavy net traffic on other unrelated jobs?
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>No jobs running during the day when most users are on.
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>>The workstations have a local copy of EXE, right?
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>No, the exe is on the server with the apps and data.
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>>Are TEMP files being created/destroyed in local workstations?
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>Yes.
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>>Just some ideas.
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>Thanks!