<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Dear Gate users,<br></div><div><div><div><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000;" data-mce-style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000;"><div><br></div><div>I'm new to Gate and I encounter the following problem while executing a very simple code:<br></div><div>when I write </div><blockquote><div>/vis/open OGL</div></blockquote><div> in my main.mac I get the following error message:<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><blockquote><div>"OGLSQt" is not compatible with your chosen session, and no fallback system found</div></blockquote><div><br data-mce-bogus="1"></div><div>Yet OpenGL is installed. Has someone an idea what the problem can be? <br></div><div><br data-mce-bogus="1"></div><div>I'm working on a virtualbox with Ubuntu 20.04.3 LTS.<br></div><div>I installed Gate 9.1 throught the ubuntu software center.<br data-mce-bogus="1"></div><div><br></div><div>Many thanks for your help,</div><div>Sarah<br></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div></div></div></div></div></div></body></html>