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# Message Log Runtime Settings

There are three main settings for runtime message logging:

Log Level | C Language Constants | JavaScript Constants | Object Oriented Constants See Function and Constant Prefixes | Value
Disabled | LR_MSG_CLASS_ DISABLE_LOG | <namespace>.MSG_CLASS_DISABLE_LOG | lr.MSG_CLASS_ DISABLE_LOG | 0
Brief | LR_MSG_CLASS_ BRIEF_LOG | <namespace>.MSG_CLASS_BRIEF_LOG | lr.MSG_CLASS_ BRIEF_LOG | 1
Extended Log | LR_MSG_CLASS_ EXTENDED_LOG | <namespace>.MSG_CLASS_EXTENDED_LOG: | lr.MSG_CLASS_ EXTENDED_LOG | 16

The following are "ORed" with the Extended Log message setting used to further refine the setting:

Log Level | C Language Constants | JavaScript Constants | Object Oriented Constants | Value
Result Data | LR_MSG_CLASS_ RESULT_DATA | <namespace>.MSG_CLASS_RESULT_DATA | lr.MSG_CLASS_ RESULT_DATA | 2
Parameter Substitution | LR_MSG_CLASS_ PARAMETERS | <namespace>.MSG_CLASS_PARAMETERS | lr.MSG_CLASS_ PARAMETERS | 4
Full Runtime Trace | LR_MSG_CLASS_ FULL_TRACE | <namespace>.MSG_CLASS_FULL_TRACE | lr.MSG_CLASS_ FULL_TRACE | 8

This setting can be "ORed" with all other message setting:

Log Level | C Language Constants | JavaScript Constants | Object Oriented Constants | Value
Only on error. Which messages sent on error depends on other settings. | LR_MSG_CLASS_ JIT_LOG_ON_ ERROR | lr.MSG_CLASS_AUTO_LOG | lr.MSG_CLASS_ JIT_LOG_ON_ ERROR | 512

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