This usually suggests that the accounting period has not been created correctly. If it is not the first year of accounts within Absolute for the client, you will need to open one of the earlier accounting periods and choose file / share with technical support. On the window where it asks for a brief description of the problem, list out the accounting periods expected. This will send the files to the Support team who will be able to amend the periods and send the repaired files back to you.
 

If this is the first year of accounts and no data has been entered you can delete the file to start afresh. To do this cancel the errors and then select the client in the main client list. Along the top choose the yellow folder icon (five icons from the right) for open client folder. You will have a list of files related to the client code. Ensure you have the full file name showing, along with the file extensions such as .pdf, .xml, .acc. If you do not click view in the menu bar within File Explorer and then tick the box for File Name Extensions. You will see some .acc files, along with any .acc.bak files. Right mouse click over each of these and select rename and change the ending to read .old. Once done go back to the clientbase and click into accounts and you will now be able to create the new accounting period.