# cblas_errprn Prints an error message. ``` __LAPACK_int cblas_errprn(__LAPACK_int ierr, __LAPACK_int info, char *form, ...); ``` ## Parameters `ierr` Error code number. `info` Exit status returned by the function call. Negative values generally indicate the index of the offending parameter. Positive numbers generally indicate that an algorithm did not converge. Zero indicates success. `form` A printf-style format string. ## Return Value Returns the minimum of `ierr` or `info`. ## Discussion Add any additional parameters required for the format string. > Important: > Apple provides the BLAS and LAPACK libraries under the Accelerate framework to be in line with LAPACK 3.9.1. Starting with iOS 26, iPadOS 26, macOS 26, tvOS 26, visionOS 26, and watchOS 26, the libraries are in line with LAPACK 3.12.0. These new interfaces provide additional functionality, as well as a new ILP64 interface. To use the new interfaces, define `ACCELERATE_NEW_LAPACK` before including the Accelerate or vecLib headers. For ILP64 interfaces, also define `ACCELERATE_LAPACK_ILP64`. For Swift projects, specify `ACCELERATE_NEW_LAPACK=1` and `ACCELERATE_LAPACK_ILP64=1` as preprocessor macros in Xcode build settings under Apple Clang - Preprocessing > Preprocessor Macros. --- 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)