https://community.graphisoft.com/t5/Installation-update/A-problem-with-installing-HOTFIX-6-for-AC14/m-p/218244#M22969 Eugene,<BR /> <BR /> ArchiCAD was designed on a way that you can have as many AC versions installed as you would like to have. Those should work fine even running side-by-side. <BR /> <BR /> It is good that you have already tested this with disabled Antivirus, usually such can cause similar problems.<BR /> <BR /> Try to boot your Windows in safe mode and apply the hotfix then.<BR /> <BR /> Let us know the result of that. Thu, 14 Feb 2013 12:13:01 GMT Marton Kiss 2013-02-14T12:13:01Z https://community.graphisoft.com/t5/Installation-update/A-problem-with-installing-HOTFIX-6-for-AC14/m-p/218243#M22968 <DIV class="actalk-migrated-content">Hello!<BR /><BR />Sorry if this question was already discussed, coudn't find it.<BR /><BR />The problem is that after installing the AC14-4204-HOTFIX6-WIN64 I get the following message: <BR />"The procedure entry point &lt;skipped&gt; could not be located in the dynamic link library Teamwork.Messaging.Client.dll." (see attached image.)<BR />And then the second one: "TWClientBase.dll not found. File must be available to run the application!"<BR /><BR />Antivirus is uninstalled. the reinstallation of AC14 does not help, getting the same error after installing the hotfix.<BR /><BR />There is also an AC15 installed on the same machine. If that could be the reason, can you please help me to make them "friends"? <span class="lia-unicode-emoji" title=":grinning_face_with_big_eyes:">😃</span></DIV><BR /><IMG src="http://community.graphisoft.com/t5/image/serverpage/image-id/70859i29EFB539D1D8DA70/image-size/large?v=v2&amp;px=999" border="0" alt="1.png" title="1.png" /> Thu, 28 Mar 2024 10:05:28 GMT https://community.graphisoft.com/t5/Installation-update/A-problem-with-installing-HOTFIX-6-for-AC14/m-p/218243#M22968 Anonymous 2024-03-28T10:05:28Z https://community.graphisoft.com/t5/Installation-update/A-problem-with-installing-HOTFIX-6-for-AC14/m-p/218244#M22969 Eugene,<BR /> <BR /> ArchiCAD was designed on a way that you can have as many AC versions installed as you would like to have. Those should work fine even running side-by-side. <BR /> <BR /> It is good that you have already tested this with disabled Antivirus, usually such can cause similar problems.<BR /> <BR /> Try to boot your Windows in safe mode and apply the hotfix then.<BR /> <BR /> Let us know the result of that. Thu, 14 Feb 2013 12:13:01 GMT https://community.graphisoft.com/t5/Installation-update/A-problem-with-installing-HOTFIX-6-for-AC14/m-p/218244#M22969 Marton Kiss 2013-02-14T12:13:01Z