On Sun, 29 Apr 2007 23:54:06 +0100 Timothy Murphy <tim@xxxxxxxxxxxxxxxxxxxxxx> wrote: > When I run xpdf I get the message > "Warning: Attempt to remove nonexistent passive grab". > > The program seems to run in spite of this. > I googled for the message, with a number of hits, > but none had any suggestion of a solution, or a cause. Really? This is on the first page of Google when I search for that phrase: http://www.cs.bham.ac.uk/research/projects/poplog/bugfixes/BUGREPORTS On that page, you find this explanation: QUOTE: Warning: Attempt to remove non-existent passive grab Answer: They are meaningless, and you want to ignore them. Do this (from Kee Hinckley) by installing an XtWarning handler that explicitly looks for them and discards them: static void xtWarnCB(String message) { if (asi_strstr(message, "non-existant passive grab", TRUE)) return; ... They come from Xt, and (W. Scott Meeks): "it's something that the designers of Xt decided the toolkit should do. Unfortunately, Motif winds up putting passive grabs all over the place for the menu system. On the one hand, we want to remove all these grabs when menus get destroyed so that they don't leak memory; on the other hand, it's almost impossible to keep track of all the grabs, so we have a conservative strategy of ungrabbing any place where a grab could have been made and we don't explicitly know that there is no grab. The unfortunate side effect is the little passive grab warning messages. We're trying to clean these up where possible, but there are some new places where the warning is generated. Until we get this completely cleaned up (1.2 maybe), your best bet is probably to use a warning handler." END OF QUOTE It appears to be a cosmetic bug. -- MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com
