During this week I’ve encountered some customers having difficult to upgrade their SAP NetWeaver JAVA stack on SQL Server. (It means that this post is specific for customers running SAP NetWeaver systems with JAVA stack on SQL Server.)
They were getting stuck in the PRE-PROCESSING phase with SUM SP13 PL6. Later it was identified this was an error in SUM SP13 PL6 causing SUM to look at wrong location for the JDBC driver.
This is fixed with SUM SP13 PL7. You can download it from http://service.sap.com/sltoolset (You need to be logged into Service Marketplace).
If you have downloaded previous version of SUM and is planning to upgrade your JAVA system running on SQL Server, we recommend you to download the version SP13 PL7 of SUM, or higher, otherwise you will get errors during the upgrade.
Please find more information on SAP Knowledge Base Article 2211685.
The errors in question are:
[Error ]: Could not connect
[Error ]: com.sap.sql.log.OpenSQLException: Could not load class com.microsoft.sqlserver.jdbc.SQLServerDriver with class loader System
[Error ]: Could not establish open SQL connection. Exception com.sap.sql.log.OpenSQLException: Could not load class com.microsoft.sqlserver.jdbc.SQLServerDriver with class loader System