FitNesse: Could not find class from Jar

Question

We have been using FitNesse to run Jira API tests for couple years now. But from last couple of months it stopped working.

Here is what the setup look like:

C:  
    FitNesse  
        JiraLib -> Jar file  
        FitNesseRoot  
        fitnesse-standalone.jar  

And this is what I have defined on the main root page:

variable defined: TEST_SYSTEM=slim  
classpath: C:\Fitnesse\JiraLib\JiraIntegrationReports.jar

Now when I run one of the method from the jar file, I am getting Could not find class and The instance decisionTable_0.methodName. does not exist errors.

And here is the execution log:

I have tried all the possible ways (with no luck) to fix this which includes-

• re-installed different versions FitNesse number of times
• re-compiled Java code and created Jar
• Tried running the tests using Fit instead Slim

Any thoughts around what's going on and how to fix it?

Thanks much in advance!!!