When I try to upload a logo in the Admin Tools section I get an error message stating "Failure: error occurred during upload of new content". I checked Alfresco.log and the error message was
"[org.alfresco.repo.jscript.ScriptNode] [http-apr-8080-exec-54] 09180461 Unsupported transformation: transformer.ImageMagick image/png to image/png" . I've looked through previous questions and tried different suggestions to no avail. If I drop the image in the Data Dictionary it uploads fine but it has a generic image thumbnail. When I open the image up, it appears in the previewer just fine. Any ideas as to what I should try next?
So, after installing the latest version of ImageMagick and changing the global properties, it did work. The problem was that I was unable to stop and restart the local server due to not having admin privileges for this computer (work laptop). Once I was given the authority to stop and start the service and have Alfresco use the new properties, the image upload worked and my image thumbnail previews worked as well.