Intel IPP status 44 (ippStsPrevLibraryUsed): meaning and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: IPP fell back to a previously loaded library because a required one could not be loaded.

Could be also:
Constant	Type	OS
KERN_RPC_TERMINATE_ORPHAN	Kern return	Mac
ECHRNG	errno	Linux
ESOCKTNOSUPPORT	errno	Mac
EL2HLT	errno	Solaris
PORT_DRIVER_INTERNAL	BugCheck Code	Windows

Previous	Next
ippStsWaterfall	ippStsLLADisabled

ippStsPrevLibraryUsed

This dispatch warning means the runtime could not load the library it wanted for the current request and reused an earlier library instead. The call may still complete, but through an implementation that was not the first choice.

It is primarily a deployment and performance signal. The important evidence is the load order, library search path, and exact IPP binary selected at runtime.

Diagnostic focus

Check whether multiple IPP versions are present in the same process search path.
Avoid mixing binaries from different oneAPI or legacy IPP installations.
Keep the warning in logs when investigating performance variance across machines.

Intel IPP Error Reporting · Intel IPP CPU dispatching

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