DigaReceive: What is Error -21?

Problem: If I want to start DigaReceive in a second instance, I get the following error message. What is it?

DB could not be initialized. InitCode = -21

Solution: Every Instance of DigaReceive needs a unique DigaReceive ID and it´s own logfile - folder. It is not possible to let all DigaReceive instances write into one folder.

Error -21 can also be caused by other problems. We recommend checking DigaSQL-Error log in such case.
For example could invalid metadata lead to a problem when inserting the new element to the DigaSystem database table.

This will result in an Error -21 which informs you that the database cannot be reached.
In such situation the DigaSQL-Error log will tell details about the problem.