ALL Operand

Use the ALL operand to release all data sets and ddnames that were allocated to your user ID with the ALLOCATE command, but are not currently in use.

Example
A data set allocated to your user ID is tying up the system, and you are not sure which data set is causing the problem. You decide to free all your data sets until you can correct the problem. You enter: `FREE ALL`

Note: After issuing FREE ALL, you may be unable to use ISPF/PDF or other programs that are dependent on the data sets just released. To regain access to ISPF/PDF and other programs, log off and log on again.