It seems that you have a phased project with the project rule Always show in Create Batch Invoice screen disabled for its phases. Enabling this rule in Project>Assignment screen allows phases to show up for billing even if there is nothing to bill.
It seems that you have a phased project with the project rule Always show in Create Batch Invoice screen disabled for its phases. Enabling this rule in Project>Assignment screen allows phases to show up for billing even if there is nothing to bill.