Query Entity failing while using includes operator.

I am using a query entity where for one of the filters i have used includes operator . When i pass some string pattern which is also present there in database to the filter where this includes operator is used it gives me the desired result but when i pass it some string pattern which is not there in database instead of returning null it returns me a appian runtime error but if i use equals operator i.e "=" in my query entity it will return me null datasubset. According my buisness requirements i have to use includes operator in my query, can someone help me with handling this appian runtime exception in my query entity while passing a string pattern which is not there in database.

OriginalPostID-244610