Workaround suggestion below.
Coming 7 years after the original question, but my Googling got me here, so maybe others are still experiencing the same issue. Also finding this with running nested loops. Using SAS Studio, which is running off a Windows machine (I believe Windows Server 2022).
Microsoft Security Essentials, mentioned in the Usage Notes (38896 & 40459) has been deprecated, but likely other antivirus/security software is still the culprit.
Not sure how far I'll get with corporate IT on getting them to turn off antivirus anywhere.
As a workaround, I created a folder and set a different libname (WORK2), and then I explicitly send all the outputs in my loop to WORK2. At the end, I'll manually delete everything in that folder. But since it's not stored in the same area of the disk, it looks to not get locked as quickly, and my loop ran.
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