ATB80109I Value specified on Send_length parameter is not valid.

Detecting Module:

Explanation
 A TP called the Send_Data service to send data
to a partner program.  The Send_length parameter specified a value
that is not valid.

System action
 The system returns a program_parameter_check
(decimal 24) return code to the caller of the Send service.

Programmer response
 Do one of the following:  If the TP called LU 6.2 Send_Data, see the description of the
Send_Data service in APPC/MVS TP Conversation Callable Services for
explanations of the valid Send_length values. Enter a valid Send_length
on the call to the Send_Data service.
If the TP called the CPI-C Send_Data service, see the description
of the CPI-C Send_Data service in the CPI-C Reference for
explanations of valid values for the Send_length parameter. Specify
a valid value on the Send_length parameter.

Source
 APPC/MVS

Detecting Module:

ATBVSSD