A_MSSQL_MAX_CHARACTERS indicates the maximum number of bytes the Database Connectors allows in a table row.
Microsoft SQL Server places a limit on the number of bytes per table row. Database Connectors adheres to this limit, but sometimes it cannot accurately count how many bytes a particular row contains (because of overhead bytes that Microsoft SQL Server adds). This variable enables the developer to set Database Connectors upper bound.
You might want to try reducing this value if a table cannot be created. By reducing the upper bound, you may be able to prevent this problem.
If Microsoft SQL Server increases the maximum number of bytes allowed in a row (in a future release of the product), you can increase the value of this variable to take advantage of the new limit.
The A_MSSQL_MAX_CHARACTERS variable has a default value of 8060.