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I have a SELECT query using several WITH blocks. Sometimes it runs successfully. Very often it fails with the error "Lookup Error - Oracle Database Error: ORA-32696: HTI: No free slot". I Googled the error, but the only advice is to "Increase memory". There are several discussion boards where people metion this error and ask what memory needs to be increased. I am not a DBA and cannot increase any memory allotments. I contacted my DBA and she said my only option was to try to optimize my query. Does anyone know specifically what causes this error?

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Are there any other errors in the error stack? Are you using parallel query? –  Justin Cave Apr 9 '12 at 4:10
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