Per Witte wrote: >I fell foul of it today again, after a good half hour's work ;o(( In >every > version of XChange Ive had there is a bug that makes it hang when I > scroll > up a file of more than one page, after editing. It usually never > happens > when I try to trigger it deliberately, of course. Ive tried tracing > through > reams of code with Jmon, but I cant find out what causes it (I never > was a > good debugger). The person maintining it (forgot his name, sorry) > had never > heard of, or encountered it, so he couldnt help. > > Has anyone else experienced the same? (We could arrange to cry > together on > some convenient occasion, if you like.) > > Per Assuming you are referring to Xchange Quill, this also occurs in standard Quill and it has happened to me so many times I now routinely save before attempting to scroll upward through text.
It might be my imagination, but it seems to happen less frequently in Xchange than in standard Quill. And seems to happen less frequently on a fast system, though that may be a red herring. Years ago, someone tried to explain to me it is because the paragraph table becomes unsynchronised, possibly due to a timing error between the 'jobs' Quill uses as data areas, or immediately after editing the paragraph table is not fully updated. I can't remember, unfortunately, who told me about it, but there was no cure except to avoid scrolling up line by line unless you saved first. My experience being that it never happens immediately after you have saved (sod's law). Where I need to backtrack, I usually Goto a previous page and scroll down, or use search to find a reference rather than backtrack to it, the only workarounds I've known. -- Dilwyn Jones _______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
