Pressing PF1 has the following additional information :
IJK56231I TEXT UNIT X'0010' CONTAINS INVALID PARAMETER
This is only happening with new Endevor users. Old user that used Endevor before, don't have any problems.
All supported versions of Endevor
A possible cause is an invalid value specified in the C1DEFLTS for WORKVOL -
WORKVOL=, VOL SER NUMBER FOR WRKUNIT
New Endevor user will have the C1DEFLTS WORKVOL value used for the initial value of the Volume Serial option in the Endevor User Defaults.
For old Endevor users, the Volume Serial option is stored in their CTLIPROF ISPF profile record and that value is used after the initial time.
Compare the User Defaults VOLUME SERIAL value of the new user with that of the working Endevor user in -