No decode delegate error in AHK while using ImageMagick

[menteith]

Hi all,

In Windows when I run

Code: Select all

convert.exe source.tif -compress Group4 output.pdf

there is no error and the output is created successfully. However, when I use AutoHotkey I get an error:

Code: Select all

Error:  0x80041771 - 
    Source:		ImageMagickObject.MagickImage.1
    Description:	convert: 420: no decode delegate for this image format `' @ error/constitute.c/ReadImage/508: 
    
    convert: 410: no images defined `' @ error/convert.c/ConvertImageCommand/3235:

Here's my code:

Code: Select all

IM := ComObjCreate("ImageMagickObject.MagickImage.1") 
IM.convert(22_2R.tif,-compress Group4,output.pdf)

Thanks for help!