Bug: Cash payment dialog sometimes blank, requires force quit

[Netsyms Technologies]

The Cash payment dialog sometimes appears without any content, requiring me to kill the process with a Terminal window. This happens during/after the receipt prints and the drawer opens.

I'm running into this problem on Ubuntu MATE 16.04 (64-bit) with the OpenJDK 8 JRE (latest version from the Ubuntu repos) and a MySQL database.

It happens fairly consistently on this one till, and never happens the first transaction since the app was opened. It only happens after at least one transaction. When launching from a Terminal window using the start.sh script, there are no error messages shown, just the usual database queries.

[Dave Cousineau]

This sounds like it is the 'Transaction Approved' message when doing card transactions. On Linux, you end up with a window so empty that it's just a 1 inch vertical line. If you select the nearly invisible window you can close it by pressing Alt-F4.

This should not happen with cash payments, only card payments, so if you are actually getting it with cash payments, it might be something else.

It requires modifying the program code and recompiling to fix this. See the Card payment popup box causing issues in 3.91.3 thread for details.