Troubleshooting: Instance migration fails when WebSphere Commerce installation directory includes white space

An exception similar to the following example occurs:

[2009.11.20.15.52.01] INFO: [wsadmin] Exporting WC_demo to C:/Program 
Files/ibm/WebSphere/CommerceServer70/temp/migrate/WC_demo.ear/exported.ear 
[2009.11.20.15.52.01] INFO: [wsadmin] WASX7017E: Exception received while running file 
"C:/PROGRA~1/ibm/WEBSPH~1/COMMER~1/migration/xml/scripts/exportEar.jacl"; exception 
information: com.ibm.ws.scripting.ScriptingException: WASX7280E: An application with name 
"WC_demo" does not exist. 
[2009.11.20.15.52.01] ERROR: BUILD FAILED 
[2009.11.20.15.52.01] ERROR: C:\PROGRA~1\ibm\WEBSPH~1\COMMER~1\migration\xml\build.xml:32: 
The following error occurred while executing this line: 
[2009.11.20.15.52.01] ERROR: C:\PROGRA~1\ibm\WEBSPH~1\COMMER~1\migration\xml\build.xml:47: 
The following error occurred while executing this line: 
[2009.11.20.15.52.01] ERROR: C:\PROGRA~1\ibm\WEBSPH~1\COMMER~1\migration\xml\app.xml:152: 
The following error occurred while executing this line: 
[2009.11.20.15.52.01] ERROR: C:\PROGRA~1\ibm\WEBSPH~1\COMMER~1\migration\xml\app.xml:251: 
The following error occurred while executing this line: 
[2009.11.20.15.52.01] ERROR: C:\PROGRA~1\ibm\WEBSPH~1\COMMER~1\migration\xml\app.xml:281: 
Java returned: 105 
[2009.11.20.15.52.01] ERROR: Total time: 7 minutes 24 seconds 
[2009.11.20.15.52.01] ERROR: [WCIMANT] WCIM has completed the job(s) with errors. 
Check the log files for details. 
[2009.11.20.16.00.19] INFO: [WCIMUtil] Stopping server.