Hi, I've traced the error to the mupdf source. In mupdf-1.18
In source/fitz/colorspace.c: #if FZ_ENABLE_ICC [..] #else [..] void fz_enable_icc(fz_context *ctx) { fz_warn(ctx, "ICC support is not available"); } [..] #endif I have no idea of mupdf packaging, but it seems that we could either compile mupdf with ICC or disable the warning using a patch. Anybody wants to chip in on this? Cheers, Ben