Troubleshoot and support > Install > WebSphere Commerce installation issues > Installation and uninstallation problems and limitations
Troubleshoot: Installation problems introduced by previously installed software
A previous version of DB2 installed on the machine might cause problems during the installation of WebSphere Commerce.
Problem
You have a previous version of DB2 installed on the machine, and encounter installation errors when installing WebSphere Commerce.
Solution
If DB2 was previously installed on the machine and is now uninstalled, ensure that the following conditions are met before using the WebSphere Commerce installation wizard to install DB2 :
- Ensure that all previous databases were properly dropped and uncataloged.
- Ensure that all database IDs have been dropped using the dasdrop and db2idrop commands. For information about these commands and their use, see the DB2 documentation.
- Ensure that any DB2 ports have been removed from the /etc/services file.
- Verify the following users do not exist on the system:
- db2fwc1
- daswc1
- Verify the following groups do not exist on the system:
- daswcg1
- db2fwcg1