Post any defects you find in the released or beta versions of the ImageMagick software here. Include the ImageMagick version, OS, and any command-line required to reproduce the problem. Got a patch for a bug? Post it here.
You did not provide enough information to help. What was the error message? What command did you use to create the PDF. Post a URL to your original raw image and the converted image so we can download and reproduce the problem and investigate.