I firstly tried to set up CPG1.3 with GD but turns out my host don't have it and will not install. So I uploaded the imagemagick binaries but recieve this error.
However there is one more thing that is a little strange and which I have not had on earlier installs of CPG. When I go to batch add I don't get to see thumbnails of the images I want to upload (probably because CPG can't find Imagemagick or GD), but I don't get to see the picture of the "Result" picture after I try to batch the files either.
Anybody got a clue?
Having either ImageMagick or GD is a pre-requisite for coppermine, all other questions are invalid when there's no image library properly set up.
Search the entire forum for "Error executing ImageMagick - Return value: 127" - there will be 3 pages of search results, which means that this question has been asked very often already. If you're webhosted, you can't install ImageMagick anyway on your own.
GauGau