For calculation of variances and posting, don’t forget that you have to run always the transactions in processing mode (ZWFA76, KKS1, KKS2, ZWFA78, CO88 and KO88). If you ran it before in test mode, you will have to run it again in processing mode.
For WIP (ZWFAA07, KKAO and KKAX) you have to run the transaction only in test mode, NOT in processing mode.
For the check of the process orders balance (KOC4), it is preferable to launch it in background in order not to reduce the SAP performance for the other SAP users.
The error messages that can appear when running each step can be checked in the spool log. Each one has a specific treatment, but only the ones generating inconsistencies require analysis. If necessary, Regional Cost Accounting FtO will provide additional support to reach a solution.