Error while exporting application

Question

While I am trying to export an application, I am getting the following error, could you please find the reason behind it? 
 Error Evaluating UI Expression Expression evaluation error : [valid:false,syntaxError:false,value:Expression evaluation error: An error occurred while executing a save: Expression evaluation error at function fn!objectReadAction_appian_internal [line 4]: An unexpected error prevented adding a feed entry (error: [org.hibernate.exception.GenericJDBCException: could not insert: [com.appiancorp.tempo.rdbms.EventFeedEntry]])] 
 History: 
 I created application with oracle db and exported 
 I imported to another env with mysql db, Then I tried to export. 
 In the above scenario I am facing this issue

Dastagiri Dudekula · Answer

Jose, I followed your steps. Creating application and exporting after including Appian objects individually and it worked well. Finally I have identified that there are special characters present in the application name. I just copied application name from the pdf while I was creating it. I just removed the entire application name in the export application window then I typed same name then it got successful export. Usually application name appears as D Meeting Management System but as raw characters: D Meetingâ€‹ â€‹Managementâ€‹ â€‹System You can also find the attached unicode detection results. What I understood that, Appian successfully exported application then it could not write feed entry for the exported application due to special characters in the application name because application name will be displayed in the feed as download link. I also cross checked, the same application will export without any issue in cloud environment. The issue I faced in on-premise installation in the local server. The special characters details are as follows. If your team work to resolve it below details will help you. U+0044 LATIN CAPITAL LETTER D character U+0020 SPACE character U+004D LATIN CAPITAL LETTER M character U+0065 LATIN SMALL LETTER E character U+0065 LATIN SMALL LETTER E character U+0074 LATIN SMALL LETTER T character U+0069 LATIN SMALL LETTER I character U+006E LATIN SMALL LETTER N character U+0067 LATIN SMALL LETTER G character U+00E2 LATIN SMALL LETTER A WITH CIRCUMFLEX character (â) U+0080 character (€) U+008B character (‹) U+0020 SPACE character U+00E2 LATIN SMALL LETTER A WITH CIRCUMFLEX character (â) U+0080 character (€) U+008B character (‹) U+004D LATIN CAPITAL LETTER M character U+0061 LATIN SMALL LETTER A character U+006E LATIN SMALL LETTER N character U+0061 LATIN SMALL LETTER A character U+0067 LATIN SMALL LETTER G character U+0065 LATIN SMALL LETTER E character U+006D LATIN SMALL LETTER M character U+0065 LATIN SMALL LETTER E character U+006E LATIN SMALL LETTER N character U+0074 LATIN SMALL LETTER T character U+00E2 LATIN SMALL LETTER A WITH CIRCUMFLEX character (â) U+0080 character (€) U+008B character (‹) U+0020 SPACE character U+00E2 LATIN SMALL LETTER A WITH CIRCUMFLEX character (â) U+0080 character (€) U+008B character (‹) U+0053 LATIN CAPITAL LETTER S character U+0079 LATIN SMALL LETTER Y character U+0073 LATIN SMALL LETTER S character U+0074 LATIN SMALL LETTER T character U+0065 LATIN SMALL LETTER E character U+006D LATIN SMALL LETTER M character Thank you. --Dastagiri