The issue is with the limit of subdirectories within a directory. The UFS and older Linux filesystem only allow 32,726 (2^15) subdirectories. To create new directories, older directories will have to be removed or cleared out.
Note: User may run the following command in the spool directory to get the directory count:
ls -d */ | wc
User may also archive the spool directory by renaming it to something like spool.old and restart the agent. The agent will create will create a new spool directory upon restart. However, it is highly recommended to periodically clean the spool. It can also be done by the agent by enabling the following parameter in the agentparm.txt (agent restart is required)
For more information on the above parameters, please consult CA Workload Automation Agent 11.3 documentation here.