Just to re-iterate:

This is not a Lanpak issue where you are unable to post a Billing batch while another user is entering a Time batch. You do not have to reinstall either the programs or the Lanpaks. BTW, even if you did, you would not lose any data as programs and data are stored separately.

There is resource locking that intentionally is blocking this scenario. You should have received a warning message that 'Posting is currently unavailable due to an open batch or access to A/R' (or something like that). In order to post a batch, no other users can be entering a batch of either type.

Do you feel this is a limitation of Adagio Time&Billing?