Question5Replies1272Views DennyV68 Member since 2015 11 posts Maantic Inc Posted: 5 years agoLast activity: 5 years 3 months ago Closed Solved 'Class not defined' exception in agentsHi All,When I am tracing the agent, getting below exception and agent stops running.com.pega.pegarules.pub.clipboard.InvalidParameterException:Class not defined in dictionary: History-Code-Pega-List. Details: Invalid value for aClassName passed to .createPage This is a possible exception in agents according to PDN(ID:967), but the thing which confusing me is the class name, which i am not able to find in PRPC.Please suggest some tips to resolve this. System Administration ×Close popoverFacebookTwitterLinkedinEmail Copy Link Copied! Moderation Team has archived post This thread is closed to future replies. Content and links will no longer be updated. If you have the same/similar Question, please write a new Question. Posted: 5 years agoCarissaW_GCS PEGA replied to DennyV68Hi Denny,Can you provide information regarding the activity executed by the agent so we can understand the steps being performed?Carissa Accepted Solution Posted: 5 years agoJonnyGar BNY Mellon replied to DennyV68Do you have some line in your activity calling save on a Code-Pega-List page? That might explain how the History- class gets expressed. Posted: 5 years agoDennyV68 Maantic Inc replied to JonnyGarActivityException details Posted: 5 years agoCarissaW_GCS PEGA replied to DennyV68Hi Denny,Thank you for providing the activity details. I see there is a hot fix related to this error for Pega 7.1.8. Please open an SR to request HFix-23160. If you are not already using Pega 7.1.8 then you would need to upgrade first to apply the hot fix.Carissa Posted: 5 years agoJonnyGar BNY Mellon replied to DennyV68It's best practice to used a named page when you Obj-Open in your activity, so you're not replacing the primary page.