I am following instruction in lesson 1 to 11 in "Intercompany/Intracompany ransactions - IC ", after I setup
the intracompany account, balancing rule, and created test journal, the posting program ends with this error, and not did not generate balancing entry.
"Invalid account in chart of accounts mapping". I verified the company and accounts setup, they all look fine.

Is their any error number?
Please upload the file is possible so that I could see the context. Thanks.

Attached is the screenshot of all my setups and the journal and the error.

2nd file attachment

Thanks for posting the images.
But the problem seems to be lying somewhere else.
Have you created a secondary ledger?
You need to complete the mapping rules, ensuring all your source ledger values are mapped to target ledger values.
You can use the Posting Execution report to identify which accounts need to be mapped from Primary to Secondary Ledgers.

Yes, there is secondary ledger, which is created based on the previous lessons.
How do I check the Posting Execution Report? My last image is the posting concurrent program output, but it doesn't mention any specific account.

General Ledger automatically generates this report every time you post journal batches. The output of the posting current program is actually the same as the above mentioned report.
The bottom line is that you have used some accounts in your journals that are not covered in the mapping attached to the secondary ledger. Trial Balance Detailed report can give you the listing of all the accounts you have used so far in that period. To get the precise listing you can run Account Analysis report.
Either disable your secondary ledger by going into the Accounting Setups. That is one solution. A quick one.
Or to solve the problem from its core, go to the Consolidation Mapping and pull up the mapping associated with your secondary ledger. Make sure the mapping covers all the accounts that you are using in your journals.