How to see what is causing an error in Camunda Task List environment?

[olvegam]

I am executing a little BPMN process on Camunda 7 and I get this error:

How can I review what it is causing this error? is it possible to access some sort of execution log?

I attached the bpmn and dmn associated files.
discDet.dmn (2.5 KB)
DMN and BPMN link.bpmn (3.7 KB)

[cpbpm]

you can look into runtime log files based on the Camunda distribution either Tomcat or Jboss server. If you are using container, login to the container and see the server log file.

[StephanHaarmann]

Hi @olvegam,

I followed @cpbpm excellent advice and figured something out:
The expression that you use to calculate the variable finalValue does not produce a long value, it produces a double. Thus, an exception is thrown, since the form expects a long value.
You have two options:

1. Change the type of the field to Double
2. Introduce a type cast by changing the expression to the following: #{(value - value*discount/100).longValue()}