From CA Datacom/AD 15.0 Install documentation:
5. Submit AAX1HOLD. This job produces the following results:
- This member downloads the error and fixcat HOLDATA from CA Support Online.
- It allocates data set HLQ.CAI.ERROR.HOLDDATA upon successful execution.
- The output of this job is used by the SMP/E receive job AAX3RECD, which uses it as input into the environment.
So AAX3RECD job requires the HOLDDATA data set created by AAX1HOLD, therefore AAX1HOLD must be executed first.