On a specific NetMaster region, only the very first MVS MODIFY console command (e.g. F NETMAS,STATUS) issued after the startup is correctly executed. The second and the following ones fail with the following error message:
IEE342I MODIFY REJECTED-TASK BUSY
Are there any settings/configurations that may be causing this?
Release : 12.2
SH SYSPARMS=MDFYLIM command shows that MDFYLIM is set to 0:
N22201 SYSPARM VALUE SOURCE NAME/USER LINKNAME
N22202 MDFYLIM 0 PROCEDURE NMINIT
When this SYSPARM is set to zero (0), then there will be one (1) Modify command to be issued, and then no more. This works as designed. See SYSPARMS Operands
Set MDFYLIM SYSPARM to a value greater than zero. The default value is 5.
If you want to prevent a Modify command from ever being issued, then you need to add PPREF='NOMODIFY' in your RUNSYSIN, e.g.:
MDFYLIM is documented here: SYSPARMS Operands
NOMODIFY here: Product Region JCL Parameters