UNDO bug.

[doug shaffer]

I may have posted this already, but it's a doozie and am wondering if

anyone else has seen it.

Bug Report:

This is an INTERMITTANT problem that occurs on my Mac G4/466 with

256MB RAM. It has occured with files that were originallybegun in

8.5.2, 9.0, and 9.0.1.

Occasionally when working in on a VWA9.0.1 file, UNDO stops

working properly, and in a way that is potentially very dangerous. Here

is an example: I was working on a file and selected a portion of the

drawing to do a 2D reshape with marquee. I accidently stopped it at a

funny angle. When I tried to do an UNDO, it jumped to a different view

(seemingly unrelated to previous views) WITHOUT undoing the 2D

reshape. The only way to go back was to 'revert to saved'. However,

the file still would not do UNDO's. I quit and re-opened the file to no

avail. A computer shutdown, then restart solved the problem.

temporarily. Later the problem came back (same file) and I had to

shut down again.

Some tests I did after doing a 'revert so saved' - I drew a line at

random, did an UNDO and was zoomed back as if i had pressed the

minus-magnification button. The line remained. It seems that the

problem is unrelated to the complexity of the action I am trying to

UNDO.

I tried all the UNDO options in the 'preferences' to no avail.

The problem has occured several times on four separate files.

Has anyone else reported this bug?

What a pain.

d. s h a f f e r

a r c h i t e c t

[Mark Farnan]

Hi Doug,

We've tracked this down to the 2D Reshape Tool - lasso mode (Alt/Option key). If you use this mode, the undo system will stop logging actions, but maddeningly will hibernate with a history of the actions it had kept track of up to that point. It will then happily apply them on request (when you issue and undo) even though they may be operations performed 10 or 100 actions ago. Your best bet is to a) not use the lasso mode of the 2D reshape tool, and b) if you accidentally do and you undo, perform a redo and close and reopen the document.

Sincerely,

Mark Farnan

Core Technologies Manager

Nemetschek NA