Step 3: Analyze errors and correct the input data

During the migration process, HCD first invokes the assembler that parses the input statements. If it detects an error, the migration process is terminated.

• HCD writes a message to the data set allocated by HCDMLOG that the migration completed with return code RC=12.
• HCD writes a message to the HCD migration log (HCDPRINT) indicating that the assembler completed with a return code other than zero.
• The assembler writes information to the assembly listing (HCDASMP) that describes the problem in more detail.

If the assembler does not detect any errors, HCD runs a validation check. If it detects an error:

• HCD writes a message to the data set allocated by HCDMLOG that the migration completed with return code higher than 4.
• HCD writes error messages to the HCD migration log (HCDPRINT) describing the validation problem.

If the return code is 0 or 4, the IODF is updated. It is, however, recommended that you review the migration log. HCD may have made assumptions that are contrary to your configuration requirements. Your actions:

1. Review the migration log. For explanations and examples refer to Errors detected during validation process.
2. Edit and correct the IOCP, MVSCP, and HCPRIO input data sets.
3. Migrate your input data sets again.