virtual P6R::P6ERR P6R::p6IRuleCompiled::changeTraceStream ( p6IDataStream pTrace  )  [pure virtual]

Run time trace and error messages and from the XPath processor can be directed to a specific datastream .

This "trace* datastream" is specified in the p6IRuleEngine::initialize( P6RULEFLAGS flags .. ) method call. However, this stream can be changed in any compiled set of rules (any number of times) by the use of this method.

Parameters:
pTrace [IN] Can be NULL (thus turning off any messages), a datastream created by the caller.
Returns:
SuccessP6R::eOk 
FailureP6R::eInvalidArgpNumber is NULL
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