We have an application that has long process flows built on 6.7.1. I have a CDhttps://community.appian.com/discussions/f/general/2003/we-have-an-application-that-has-long-process-flows-built-on-6-7-1-i-have-a-cdWe have an application that has long process flows built on 6.7.1. I have a CDT Cars that we are looking to update. I noticed in some places we do union(pv!ProcessVariable, rule!queryrule). Testing this function breaks when I update the cdt for processen-USTelligent Community 12RE: We have an application that has long process flows built on 6.7.1. I have a CDhttps://community.appian.com/thread/7181?ContentTypeID=1Thu, 30 Jan 2014 07:38:03 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:f15ece3b-8181-49b6-aac4-12bb4e0f8206edwardI figured it out the union function doesn&#39;t work for compares of different versions of CDTs. I can compare elements within both of those CDTS to determine which ones to extract out.<div style="clear:both;"></div>RE: We have an application that has long process flows built on 6.7.1. I have a CDhttps://community.appian.com/thread/7141?ContentTypeID=1Wed, 29 Jan 2014 10:30:42 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:fc819e2c-f9d1-4801-991b-0873d42df392hemalathatHi,<br />I don&#39;t think CDT version can be changed in the running instances. <br />Here is the link related to that <a href="/search?q=OriginalPostID-84360">forum.appian.com/.../f-84360</a><br /><div style="clear:both;"></div>