ExpressionEvaluationException class not resolved error

Hi All,

I am planning to create plugin in which I am using ProcessDesign Service to evaluate expression - 

ProcessDesignService pds = ServiceLocator.getProcessDesignService(sc);

TypedValue tv = pds.evaluateExpression(expression);

In eclipse it throws error- 
The type com.appiancorp.process.expression.ExpressionEvaluationException cannot be resolved. 

I found out that this exception was part of appian-process.jar. But I am unable to find this jar file.

Can someone let me know location of above jar file please?