W:\InfoShare\App\Utilities\DITA-OT\dita-ot-2.5.4_zoomin\plugins\org.dita.base\build_preprocess.xml:55: Failed to run pipeline: Illegal character in scheme name at index 0: 68040:%20H0X_AppendixNum:%20Appendix%20B:%20Log%20Messages
It took really long to identify the issue. The error message does not help in any way identifying the cause for the issue.