ATB80040I Value specified on TP_name_length parameter is not valid.

Detecting Module:

Explanation
 A TP called the LU 6.2 Allocate or CPI-C Set_TP_Name
service to set the TP_name characteristic for a conversation. The
TP_name_length parameter specified a value that is not valid.

System action
 One of the following:  If the TP called the LU 6.2 Allocate service, the system returns
a parameter_error (decimal 19) return code to the caller
If the TP called the CPI-C Set_TP_Name service, the system returns
a program_parameter_check (decimal 24) return code to the caller.

Programmer response
 One of the following:  If the TP called the LU 6.2 Allocate service, specify a value
between 0 and 64 on the TP_name_length parameter
If the TP called the CPI-C Set_TP_Name service, specify a value
between 1 and 64 on the TP_name_length parameter.

Source
 APPC/MVS

Detecting Module:

ATBVSAL, ATBVSSV