Probably the only way you could reliably undo post schedule, would be to open the entire programme exclusively.
Otherwise how would you know from looking at the few projects you have open what the last undo key press did to a project on the other side of the world (that you don’t have access to, but has to be undone because that work was delayed due to - erroneous - changes in your project). Then you have to notify every user who has been logged in to the software, and the executive software, the reporting suites etc etc. to advise them of the changes.
While this may be feasible in a local office environment, in a global enterprise (which the software was ostensibly designed for) it becomes more trouble than it’s worth.

Hi guys,

For all you guys that neve learned to use the escape button when you made the mistakes, Primavera project manager V5 has the undo button, which you have always longed for

Erm...

MM PowerProject also has automatic loop detection when loop dependecies are attempted... a warning even before the link is made, let alone before the network is rescheduled.

As a complete aside, what is it that planners need to undo? Masses of mistakes none of which are recognised until scheduled? A single mistake that might be included with many other correct entries? How long after making the entry should undo be available? Would the expectation be that all other users of the system that have made any entry to the DB be told about the undo, because it may have affected their work even if not apparently connected? Primavera does now have a limited undo feature, so I guess it’s slightly irrelevant, but I’ve never been able to understand what the errors are that cause such an issue with experienced planners.

What I believe everyone is looking for is a ’Rollback’ feature (a la ORACLE) where a database can be rolled back to a certain point, and picked up again.
While you can’t do this live on P3e yet, and depending on how they feel about the Dev work, you may never be able to; you can manually set up rollback points.... very regular backups.
Then, it’s just a case of apologising to all of the other users who’s work since the last backup has gone

I don’t quite understand all this about “writing an undo feature for large databases is not an easy feat”, “the undo concept is a rare animal in the database world” and “in order have this function works, more or less you need duplicate your current working dataset at backend”.

PowerProject, the software that most Primavera users deride as ‘Mickey Mouse’, has had a full UNDO feature for ages, including undo through save. Makes me wonder if Clive’s theory is closer to the truth than we imagine?

I know nothing about how software is written but find it difficult to imagine that duplicate datasets are required. I thought it would be merely a matter of recording the keystrokes and that UNDO merely applies the inverse?

Regards

David

I agree. UNDO is rara in database system. In order have this function works, more or less you need dulpicate your current working dataset at backend.
The UNDO function on P5.0 is not a "full" Undo function. Undo the editing is allow, Undo a scheduling/level is not provided.

for what they charge per unit that is a very bad approach

The trouble is this

when primavera was first written planners never made mistakes cos they were real planners who were used to using pencils and tape and only ever had 20 bars on their programmes

then other software was developed that was used by less capable people who in turn migrated to P3 with their mistakes

and lo

Primavera could still not believe people could make mistakes and steadfastly continued to believe that planners were as they always had been PERFECT.

However

one day a little while ago a software designer at primavera did make a mistake he thought he was in the resource column and filled the cell whiping out 2500 descriptions worse still the computer immeadiatly saved his error not mistake cos primavera planners dont make those so in an effort to correct this he went into the software language and tied up the Windows loose ends and lo
UNDO WAS BORN

I for one as an original _P3 planner will never admit to needing the undo function as i have come to terms with my frustration at loosing my data and have reached a higher level of KAMA when i programme AND NEVER MAKE MISTAKES.

Yes, the undo is finally here. I started using ver 5.0 yesterday and a collegue showed me the icon this morning. It’s under tools ...... Not sure what the word is but not Undo. I have not used it yet.

Alex, are you sure? in version 5.0, this UNDO feature is available?.

Not sure what’s happen to Primavera, PEC 5.0 launching is in delay.

Gents

Version 5

It will be out very soon (I been told August this year)

Alex

Why do you ask it here?
Repeat your question on P3e/c forum.
Best Regards,
Vladimir