Encountering errors can be rather frustrating and how many times have you thought what could have caused the error. Just like everyone I get overwhelmed by the efforts like QuickBooks Error 12029 and to ease out finding the solution, I listed the cause. Here are the reasons for its occurrence.
Firewall settings are configured such that it is blocking QuickBooks access to the server.
SSL settings are incorrect.
Dropped Internet Packets.
Network time out is one of the major reasons for QuickBooks Error 12029.
Once through the list above you can easily move ahead to fix the issue or to speed up the process, contact the QB Pro team