List & Label Error 1012- while sending mail with PDF attachment

[Ricardo_Garos1 (Ricardo Garos)]

Some customers experience an Error ( 1012-) message while mailing an invoice via MAPI to Outlook (with Microsoft Exchange account). Sometimes it helps to restart the Pc, but most of the time the problem returns or stays permanently.
Sometimes it helps changing Mail to Outlook in Default apps in the Windows Settings (Windows 10), but after mailing one invoice the problem is back and the Pc has to be restarted.
The List & Label 21 (Rev. 21.000) program is being used from within our own program.
Any idea of a solution for this problem?

[Gunther_Schwarze (Günther Schwarze)]

I’d start with creating a log file. The procedure is described here:

Troubleshooting Guidance

Introduction This article is intended to help you to find and fix errors and issues on your own. It gives you tips on how to best handle a problem that occurs, how to search for the problem, and what to do in what order. If you still need to contact our technical support team, it will help you make the initial preparations to provide as much information as possible. A large attention is paid to the so-called debugging. Debugging in our case means to examine your program live for errors during…