https://community.appian.com/discussions/f/general/13113/unable-to-acquire-a-read-connectionThere is a problem with task “Get User Group” in the process . ERROR:An error occurred while evaluating expression: UserGroup:getgroupbyname(pv!UserGroupName) (Expression evaluation error at function &#39;getgroupbyname&#39;: Error evaluating function &#39;getgroupbynameen-USTelligent Community 12https://community.appian.com/thread/59143?ContentTypeID=1Tue, 14 Aug 2018 05:21:16 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:42eabac0-c813-4eed-ba1a-9ea75bbc4ffasushilk17No specific time,<br /> Some time twice a day, which is also not regular. but need manuall intervention to resume the process.<br /> Added retry condition, but looking to find the main reason.<div style="clear:both;"></div>https://community.appian.com/thread/59141?ContentTypeID=1Tue, 14 Aug 2018 04:58:42 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:da8ff708-a1c3-4918-b05a-99d0ae45e5ffShanmukhaHi Sushik,<br /> <br /> We have faced such kind of issues. In our case it was resolved automatically when server is free to take the request. I think you might already aware of that most of the appian expression rule or function calls are API calls. Sometimes it may happen that the server was bust to take the request that you get this error. <br /> <br /> Just wanted to ask you few queries. <br /> 1) How frequently you get this kind of error?<br /> 2) Is there any specific time frame where you get this kind of error in the day?<div style="clear:both;"></div>