Generally when you cannot post to an account in the general journal, the account is linked in some module.  Check this under Setup, Settings, Module Name, Linked Accounts for most of the link accounts in the program.

Thank you, that was exactly the problems so I have now corrected it.

Hi Gwenne, if this suggested answer helped, please mark it as verified  (by clicking the "…."next to Reply, on the response) for the benefit of others in this forum . Thank you!