Common error codes:
 
     1     -   Unable to open database 
     2     -   Database corrupted 
     3     -   License checksum failure 
     4     -   License limit exceeded 
     5     -   License limit exceeded 
     6     -   Product not licensed 
     7     -   Unknown license failure 
     8     -   License DB too large 
     9     -   Heap error 
     10    -   Cannot contact License manager 
     11    -   Message send failure 
     12    -   Message receive failure 
     13    -   Returned checksum failure 
     14    -   Integrity check failure 
     15    -   License limit exceeded - no overdraft 
     16    -   License limit exceeded 
     17    -   License limit exceeded 
     98    -   User tampering with license system 
     100   -   User tampering with license system