failure building derby docs tools target?

[Myrna van Lunteren]

Hi,

I haven't tried building the derby docs in a long time, but I just
tried it and I got a failure:
....
topicpull:
     [xslt] Transforming into C:\derbyt\docs\trunk\temp
     [xslt] Processing C:\derbyt\docs\trunk\temp\ctools1003034.dita to
C:\derbyt\docs\trunk\temp\ctools1003034.dita.pull
     [xslt] Loading stylesheet
C:\derbyt\docs\trunk\DITA-OT1.1.2.1\xsl\preprocess\topicpull.xsl
     [xslt] : Fatal Error! Index: 0, Size: 0
     [xslt] : Fatal Error! Fatal error during transformation Cause:
Fatal error during transformation
     [xslt] Failed to process null

BUILD FAILED
C:\derbyt\docs\trunk\build.xml:80: The following error occurred while
executing this line:
C:\derbyt\docs\trunk\build.xml:134: The following error occurred while
executing this line:
C:\derbyt\docs\trunk\DITA-OT1.1.2.1\pretargets.xml:136: Fatal error
during transformation

Does anyone have any insight or suggestions?

Myrna