Expression Evaluation error while executing Interface

Question

The following error occurred while executing an interface rule 
 
 Error: 
 Expression evaluation error in rule 'hrob_surveydatareport_grid' (called by rule 'hrob_newtabledetailedreport') at function a!buttonWidget [line 8]: An error occurred while executing a save: java.lang.IllegalArgumentException: Require Writer Object 
 
 The Appian version is 18.1. 
 Any help would be much appreciated, thanks.

Sandeep Deshmukh · Answer

Hi apoorvam , 
Please share a!buttonWidget [line 8]: code. Something went wrong while saving value on button click.

Sandeep Deshmukh · Answer

Code looks fine to me. try to save individual values to ri!TriggerExportData cdt.

aloks0189 · Answer

Hi apoorvam 3 questions here: 
 1. What's the type of TriggerExportData rule input, is that a CDT or Any type? 
 2. What's the type of RequiredDocVersion ? Is that an integer? 
 3. Are you trying to perform any operation which requires writer object, if so then you need to declare that variable in bind() first 
 However it will be easy to understand this problem statement if you can share your interface code and variable types. 
 Hope this will give you a clue to find out the root cause