The FT241 message is received from the product.

When the FT241 message is received from the product it's because it tried to initialize a CMRDETL detail history file for the DDNAME listed in the message and failed. 

This usually happens when the file is created manually instead of automatically via the CREATE=YES parameter in the CMRDETL view. The detail history files must be created per the published documentation with the attributes that are highlighted. 

In addition to verifying that the VSAM KSDS cluster for the listed DDNAME is correctly defined per the Customization Guide, ensure that the KEYS parameter in the IDCAMS definition provided in member CMRDDTL in the BBSAMP is not changed from what is distributed with the product. BMC AMI Ops Monitor for CICS (Mainview) has been coded to expect a key of 27. This must never be changed or the internal code will not work as designed. 

It is advised to use the CMRDETL view for automatic file creation as this helps to ensure that the files will be defined correctly and avoid future issues.