RFT playback results in "NoClassDefFoundError" error

Technote (troubleshooting)


Attempts to playback IBM Rational Functional Tester (RFT) script when a class in an external jar tries to load an RFT class results in "A NoClassDefFoundError" exception.


The RFT classloader does not include RFT jar files in the class path if the datastore definition file is missing.

Resolving the problem

Add a resources\DatastoreDefinition.rftdsd to every jar that contains classes that depend on RFT classes as the file cannot be empty:

  1. Copy a resources\DatastoreDefinition.rftdsd from an existing RFT project folder

  2. Remove any project-specific values from resources\DatastoreDefinition.rftdsd

Note: See the attached  jar1.jar file as an example.


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Document information

More support for:

Rational Functional Tester
General Information

Software version:


Operating system(s):

Linux, Windows

Reference #:


Modified date:


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