https://community.graphisoft.com/t5/Libraries-objects/Illegal-nesting-of-group-definitions/m-p/185173#M19860 No, you cannot nest group definitions like you are attempting (page 111 of the US GDL Reference Guide). You could call a macro within the group definition if that would help. Thu, 05 Aug 2010 04:57:51 GMT Erich 2010-08-05T04:57:51Z https://community.graphisoft.com/t5/Libraries-objects/Illegal-nesting-of-group-definitions/m-p/185172#M19859 <DIV class="actalk-migrated-content"><R>hello.<BR /> I'm korean. my english is not good. <IMG src="https://community.graphisoft.com/legacyfs/online/emojis/icon_sad.gif" style="display : inline;" /> <BR /> I'm making an object using GDL.<BR /> <BR /> i just wondered that I can define a group in other group?<BR /> <BR /> for example...<BR /> <BR /> 100:<BR /> group "a"<BR /> gosub 200<BR /> endgroup<BR /> return<BR /> <BR /> 200:<BR /> group "b"<BR /> brick 1,1,1<BR /> endgroup<BR /> return<BR /> <BR /> <BR /> should I change the logic or not..?</R></DIV> Thu, 05 Aug 2010 03:00:26 GMT https://community.graphisoft.com/t5/Libraries-objects/Illegal-nesting-of-group-definitions/m-p/185172#M19859 Anonymous 2010-08-05T03:00:26Z https://community.graphisoft.com/t5/Libraries-objects/Illegal-nesting-of-group-definitions/m-p/185173#M19860 No, you cannot nest group definitions like you are attempting (page 111 of the US GDL Reference Guide). You could call a macro within the group definition if that would help. Thu, 05 Aug 2010 04:57:51 GMT https://community.graphisoft.com/t5/Libraries-objects/Illegal-nesting-of-group-definitions/m-p/185173#M19860 Erich 2010-08-05T04:57:51Z