<div dir="ltr"><div class="gmail_default" style="font-size:small">I wonder if the issue is the convert environment is different inside NCL versus when you run it outside NCL.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">What is the exact command that you use? Is it possible that an environment variable like LD_LIBRARY_PATH is needed for convert to run, and perhaps it's not set the same in both situations? Or, if you have multiple versions of "convert" on your computer, you may be executing different versions inside and outside NCL.</div><div class="gmail_default" style="font-size:small"><br></div></div><br><div class="gmail_quote"><div dir="ltr">On Tue, Jan 8, 2019 at 6:31 PM 半个丑角 <<a href="mailto:644457443@qq.com">644457443@qq.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>
<div>Thanks for your letter very much, Mary Haley. I have tried to delete wks before call "system" procedure to convert my graphic, but it didn't work, the same error message appeared again.</div></div></blockquote></div>