What exactly does this mean?

[deleted_user]

I have regularly been receiving the following error:

ERROR: A lock is not available for SASUSER.QURY0409.DATA, lock held by another process.

This ocurs even right after I start EG and run my 1st query.

[ChrisHemedinger]

It means that another SAS session has the data set open. Since this is in SASUSER, it must be a SAS session that you were using previously, perhaps via a different EG session.

If this is a local SAS install on your PC, check Windows Task Manager for extra SAS.EXE sessions that might be running. One of these SAS sessions might be locking your data set file.

Chris