# Error codes Error codes that vImage functions return when an operation fails. ## Topics ### Constants [`enum Error`](/documentation/Accelerate/vImage/Error) An error that occurs during a vImage operation. [`var kvImageNoError: Int`](/documentation/Accelerate/kvImageNoError) The vImage function completed without error. [`var kvImageRoiLargerThanInputBuffer: Int`](/documentation/Accelerate/kvImageRoiLargerThanInputBuffer) The region of interest, as specified by the `srcOffsetToROI_X` and `srcOffsetToROI_Y` parameters and the height and width of the destination buffer, extends beyond the bottom edge or right edge of the source buffer. [`var kvImageInvalidKernelSize: Int`](/documentation/Accelerate/kvImageInvalidKernelSize) Either the kernel height, the kernel width, or both, are even. [`var kvImageInvalidEdgeStyle: Int`](/documentation/Accelerate/kvImageInvalidEdgeStyle) The edge style specified is invalid. [`var kvImageInvalidOffset_X: Int`](/documentation/Accelerate/kvImageInvalidOffset_X) The `srcOffsetToROI_X` parameter that specifies the left edge of the region of interest is greater than the width of the source image. [`var kvImageInvalidOffset_Y: Int`](/documentation/Accelerate/kvImageInvalidOffset_Y) The `srcOffsetToROI_Y` parameter that specifies the top edge of the region of interest is greater than the height of the source image. [`var kvImageMemoryAllocationError: Int`](/documentation/Accelerate/kvImageMemoryAllocationError) An attempt to allocate memory failed. [`var kvImageNullPointerArgument: Int`](/documentation/Accelerate/kvImageNullPointerArgument) A pointer parameter is `NULL` and it must not be. [`var kvImageInvalidParameter: Int`](/documentation/Accelerate/kvImageInvalidParameter) Invalid parameter. [`var kvImageBufferSizeMismatch: Int`](/documentation/Accelerate/kvImageBufferSizeMismatch) The function requires the source and destination buffers to have the same height and the same width, but they do not. [`var kvImageUnknownFlagsBit: Int`](/documentation/Accelerate/kvImageUnknownFlagsBit) The flag is not recognized. [`var kvImageColorSyncIsAbsent: Int`](/documentation/Accelerate/kvImageColorSyncIsAbsent) [`var kvImageCoreVideoIsAbsent: Int`](/documentation/Accelerate/kvImageCoreVideoIsAbsent) [`var kvImageInternalError: Int`](/documentation/Accelerate/kvImageInternalError) A serious error occured inside vImage, which prevented vImage from continuing. [`var kvImageInvalidCVImageFormat: Int`](/documentation/Accelerate/kvImageInvalidCVImageFormat) [`var kvImageInvalidImageFormat: Int`](/documentation/Accelerate/kvImageInvalidImageFormat) [`var kvImageInvalidImageObject: Int`](/documentation/Accelerate/kvImageInvalidImageObject) [`var kvImageInvalidRowBytes: Int`](/documentation/Accelerate/kvImageInvalidRowBytes) [`var kvImageOutOfPlaceOperationRequired: Int`](/documentation/Accelerate/kvImageOutOfPlaceOperationRequired) [`var kvImageUnsupportedConversion: Int`](/documentation/Accelerate/kvImageUnsupportedConversion) Some lower level conversion APIs only support conversion among a sparse matrix of image formats. ### Core Video Image Format Errors [`var kvImageCVImageFormat_NoError: Int`](/documentation/Accelerate/kvImageCVImageFormat_NoError) An error code that indicates the conversion completed without error. [`var kvImageCVImageFormat_ColorSpace: Int`](/documentation/Accelerate/kvImageCVImageFormat_ColorSpace) An error code that indicates the image’s color space is missing. [`var kvImageCVImageFormat_ChromaSiting: Int`](/documentation/Accelerate/kvImageCVImageFormat_ChromaSiting) An error code that indicates the chroma siting information is absent. [`var kvImageCVImageFormat_AlphaIsOneHint: Int`](/documentation/Accelerate/kvImageCVImageFormat_AlphaIsOneHint) A hint that indicates the alpha channel is opaque. [`var kvImageCVImageFormat_ConversionMatrix: Int`](/documentation/Accelerate/kvImageCVImageFormat_ConversionMatrix) An error code that indicates the required conversion matrix is absent. [`var kvImageCVImageFormat_VideoChannelDescription: Int`](/documentation/Accelerate/kvImageCVImageFormat_VideoChannelDescription) An error code that indicates the range and clipping information is missing. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)