ISPF109 )IM error - Exceeds maximum )IM level of 15, aaaaaaaa record-bbbbbbbb.
Explanation
The file tailoring control file aaaaaaaa has more than fifteen levels of imbeds (imbed within imbed). Only fifteen are allowed. The error was discovered at record bbbbbbbb of the control file.
Programmer response
Correct the control file so that no more than 15 imbed levels are used.