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ippStsFftFlagErr
IPP FFT setup uses flags to select normalization, layout and transform behavior. A bad flag value means the transform specification cannot be initialized or interpreted.
This is a setup error, not a frequency-domain math result. Check flag combinations before looking at output bins.
Check these details for ippStsFftFlagErr
- Flags passed to FFT initialization.
- Whether forward and inverse setup objects use compatible options.
- Any wrapper enum conversion to IPP flag constants.
Intel IPP Error Reporting · Intel IPP FFT · Intel IPP Signal Processing
Interpreting ippStsFftFlagErr
ippStsFftFlagErr is Intel IPP status -16. AllStat describes it as “Invalid value for the FFT flag parameter.”. For ippStsFftFlagErr, the decisive context is the exact IPP routine and overload, because status names are shared across image, signal, codec, cryptography, and data-compression domains with different parameter contracts.
Developer checks for ippStsFftFlagErr
- Record the full function name, library version and CPU dispatch, source and destination types, ROI or vector length, step values, scale factor, and every state/specification object passed to the call.
- Validate the ippstsfftflagerr parameter group before changing buffers: initialization routines often establish constraints inherited by later processing calls.
- For ippStsFftFlagErr, use ippGetStatusString for logging but branch on the numeric IppStatus value; localized or wrapper text is not a stable program contract.
Retrying ippStsFftFlagErr with unchanged arguments normally reproduces the same validation failure. For ippStsFftFlagErr, rebuild the affected IPP state when configuration changed, verify buffer bounds and alignment, and isolate the smallest call that still returns the status.
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