When running the Reporting Tool GUI and attempting to open a query with a '%' (percent) character in the name, the following error message is thrown:
"Unable to create this part due to an internal error. Reason for the failure: Error parsing Query:null"
If the file did exist, but has a '%' (percent) character in it:
This error message is caused by a bug with Java 1.5 not recognizing file names with a '%' (percent) character in them. You will either need to remove the '%' character in the file name, or change your Java to Java 1.6 or higher. This can be done by putting the higher version of Java as the first path in your %PATH% (pointing to java's /bin/ directory). Your OS admin should have more information regarding this.