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Below is a table of decoded Ignition 8 Quality codes (Python script below that was used to generate this list on Ignition 8.1.13)

Quality	Code	Ignition Subcode
Good_Unspecified	0	0
Good_WritePending	2	2
Good	192	192
Good_Provisional	200	200
Good_Initial	201	201
Good_Overload	202	202
Good_Backfill	203	203
Uncertain	1073742080	256
Uncertain_LastKnownValue	1073742081	257
Uncertain_InitialValue	1073742082	258
Uncertain_DataSubNormal	1073742083	259
Uncertain_EngineeringUnitsExceeded	1073742084	260
Uncertain_IncompleteOperation	1073742085	261
Bad	-2147483136	512
Bad_Unauthorized	-2147483135	513
Bad_AccessDenied	-2147483134	514
Bad_Disabled	-2147483133	515
Bad_Stale	-2147483132	516
Bad_TrialExpired	-2147483131	517
Bad_LicenseExceeded	-2147483130	518
Bad_NotFound	-2147483129	519
Bad_ReferenceNotFound	-2147483128	520
Bad_AggregateNotFound	-2147483127	521
Bad_NotConnected	-2147483126	522
Bad_GatewayCommOff	-2147483125	523
Bad_OutOfRange	-2147483124	524
Bad_DatabaseNotConnected	-2147483123	525
Bad_ReadOnly	-2147483122	526
Bad_Failure	-2147483121	527
Bad_Unsupported	-2147483120	528
Error	-1073741056	768
Error_Configuration	-1073741055	769
Error_ExpressionEval	-1073741054	770
Error_TagExecution	-1073741053	771
Error_TypeConversion	-1073741052	772
Error_DatabaseQuery	-1073741051	773
Error_IO	-1073741050	774
Error_TimeoutExpired	-1073741049	775
Error_Exception	-1073741048	776
Error_InvalidPathSyntax	-1073741047	777
Error_Formatting	-1073741046	778
Error_ScriptEval	-1073741045	779
Error_CycleDetected	-1073741044	780

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