Regeneration Issues - Unexpected Feature Failures

I have seen models created in older releases fail when opened in a newer release. I have always been able to "fix" the failures. I am not aware of any config options that would mitigate this in general.

Have you tried to open this Creo 2 model in Creo 4, 5, or 6 and does it have the same issues as you note above?

Does your Creo 2 model use absolute or relative accuracy? This may be relevant depending on what is failing. Does the model have geom checks present in Creo 2? If so, are these geom checks associated with the features failing in Creo 7?

Creo 7 introduces multi-body as well as defaults to absolute accuracy.  These may be relevant to the issue.

Without seeing the actual model, it is almost impossible to diagnose. It is worth a try to force a regen in a build prior to Creo 7 to see if the same issues are there.

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@VMcD wrote:

We recently updated from Creo 2.0 to Creo 7.0.4.0 (tested in 7.0.6.0 too) and we are seeing issues with regeneration and unexpected feature failures. It seems Creo 7 is not as robust as Creo 2?

 

1. Open the model, nothing to regenerate. Model looks complete.
2. Delete unused sketch
3. Extend feature fails

 

1. Force regen of model with Model Player
2. Trim features creates extra edge
3. Style surface fails

 

Has anyone dealt with this issue before?

Are there any best practices or config options to make older Creo model behave?

 

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Hi,

your problem is "model dependent". Please upload it for testing purposes.

Are you sure the same thing doesn't happen in Creo 2? There have been other threads about things not working in Creo 7 and then when the OP when back and retested in a prior release the same thing happened.

While it is true that PTC changed the default tolerance to absolute in Creo 7 that does not change pre-existing models nor does it have any effect if you have start parts.

While PTC has changed some of the behind the scenes modeling we still have models done in the 90s that open without issue.

Hi all,

@anursingh asked for an update. Here it is.

Since I'm unable to share the data here I opened 2 PTC cases and 2 SPRs have been opened.

I'll post an update when I get one.