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ORA-4031	
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NO data found, usually this occurs when the apply try to see to apply on a record and its not there in standby, so its fails, we need to skip the transactions.

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ORA-26786	
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The is raised when SQL apply finds the row to be modified using the primary or unique key information contained in the LCR, but the before image of the row does not match the image contained in the LCR

Note: use the skip_failed_transaction when starting the SQL apply process or use the dbms_logstdby.skip_transaction procedure

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ORA-26787
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The is raised when SQL cannot find the row to be modified using the primary or unique key information contained in the LCR

Note: use the skip_failed_transaction when starting the SQL apply process or use the dbms_logstdby.skip_transaction procedure

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ORA-04042
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This is permission (grant/revoke) on a procedure or function that exists in one of the internally skipped schemas. You can handle this by registering an error handler with the SQL apply to skip errors encountered during the apply of such statements