https://communities.sas.com/t5/SAS-Enterprise-Guide/What-exactly-does-this-mean/m-p/516#M142 I have regularly been receiving the following error:<BR /> <BR /> ERROR: A lock is not available for SASUSER.QURY0409.DATA, lock held by another process.<BR /> <BR /> This ocurs even right after I start EG and run my 1st query. Mon, 01 May 2006 22:22:28 GMT deleted_user 2006-05-01T22:22:28Z https://communities.sas.com/t5/SAS-Enterprise-Guide/What-exactly-does-this-mean/m-p/516#M142 I have regularly been receiving the following error:<BR /> <BR /> ERROR: A lock is not available for SASUSER.QURY0409.DATA, lock held by another process.<BR /> <BR /> This ocurs even right after I start EG and run my 1st query. Mon, 01 May 2006 22:22:28 GMT https://communities.sas.com/t5/SAS-Enterprise-Guide/What-exactly-does-this-mean/m-p/516#M142 deleted_user 2006-05-01T22:22:28Z https://communities.sas.com/t5/SAS-Enterprise-Guide/What-exactly-does-this-mean/m-p/517#M143 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. <BR /> <BR /> 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.<BR /> <BR /> Chris Tue, 02 May 2006 12:56:28 GMT https://communities.sas.com/t5/SAS-Enterprise-Guide/What-exactly-does-this-mean/m-p/517#M143 ChrisHemedinger 2006-05-02T12:56:28Z