Enterprise manager configuration failed due to the following error - null

OKayyyy, everything works APART from EMCA:

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[oracle@<server> templates]$ dbca -silent \
>        -createDatabase \
>        -templateName <sid>_template.dbt \
>        -gdbName <sid> \
>        -sysPassword <pw> \
>        -systemPassword <pw> \
>        -emConfiguration LOCAL \
>               -dbsnmpPassword <pw> \
>               -sysmanPassword <pw> \
>               -smtpServer smtp.<domain> \
>               -emailAddress <email> \
>        -characterset WE8MSWIN1252 \
>        -listeners extproc_lsn,<sid>_lsn . . . I had trouble specifying multiple listeners until I chanced upon comma separation with no spaces, could this be the problem for EMCA ?

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Creating and starting Oracle instance
...
Creating database files
...
Creating data dictionary views
...
Adding Oracle JVM
...
Adding Oracle XML DB
...
Adding Enterprise Manager Repository
...
Completing Database Creation
...
100% complete
Look at the log file "/u01/app/oracle/product/10.2.0/db_1/cfgtoollogs/dbca/dev02/dev020.log" for further details.