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Thread: Purge Unused - Consequences?

  1. #1
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    Purge Unused - Consequences?

    Hi,

    On the Essential Tips potential POTM thread, Munkholm wrote:

    Never "Purge Unused" without fully understanding the consequences

    - Having just done this I'm very curious to know what the consequences are and what to look out for?

    Bryan

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    Administrator Munkholm's Avatar
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    The "Purge Unused" command have all items checked by default, so if you just run a quick purge, you'll loose EVERY unused System family, Dimension style, Annotations etc. - Which you'll then have to reload from the template if you need them later on.

    Not saying that purging is always a bad thing! Just understand the consequences...

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    OK - given that've we've yet to set up a company template getting rid of all of the OOTB families might not be too bad an idea !

    Thanks for the heads up.

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    Junior Member bassed's Avatar
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    Quote Originally Posted by brinxb View Post
    OK - given that've we've yet to set up a company template getting rid of all of the OOTB families might not be too bad an idea !

    Thanks for the heads up.
    You can always load new familes in as needed, purging helps keep you lean and mean with only relative content used in the model. Purging is a good thang, mang.

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    Moderator DaveP's Avatar
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    The only thing I've seen that's really a pain if you Purge is Curtain wall Mullions. There's no way to Load a Mullion Family. You have to have a mullion physically placed in another project and Copy/Pasta it into the one you Purged.

    IIRC, Repeating Details can be difficult, too.

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    Forum Co-Founder Twiceroadsfool's Avatar
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    Purging sucks.

    Most people treat it like theyre still in a CAD world, and file size means that much. It doesnt mean squat, and it gets rid of a TON.

    Family Types cannot have some parameter values (Type Mark, etc) populated in the family editor. So they get loaded in a template with those values. Purge unused = byebye. Loaded content for shared nested families populates Family Type selectors in the order of loading, NOT in alphabetical order. So PU eliminates a ton of families, then they get reloaded in som haphazard order based on the order they are NEEDED, not the order they are named.

    And in the end: If your template is well built, whats in there is all stuff people end up needing by jobs end. So they do PU because theyre not thinking, then little by little they have to load all the same stuff back in. Its silly.

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    Junior Member bassed's Avatar
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    Quote Originally Posted by Twiceroadsfool View Post
    Purging sucks.

    Most people treat it like theyre still in a CAD world, and file size means that much. It doesnt mean squat, and it gets rid of a TON.

    Family Types cannot have some parameter values (Type Mark, etc) populated in the family editor. So they get loaded in a template with those values. Purge unused = byebye. Loaded content for shared nested families populates Family Type selectors in the order of loading, NOT in alphabetical order. So PU eliminates a ton of families, then they get reloaded in som haphazard order based on the order they are NEEDED, not the order they are named.

    And in the end: If your template is well built, whats in there is all stuff people end up needing by jobs end. So they do PU because theyre not thinking, then little by little they have to load all the same stuff back in. Its silly.

    Totally agree, except OP indicated initial Template setups were in the works. IMHO it is best to start from scratch in that area, or utilize your most broad based project as your initial template for an office. After all that happens, only certain inividuals should have "verbal" permision to PU, and a bit of thought should be placed as to what can and can't be purged. I think your point about file size is also spot on, the issue is so many try and get away with minimum Hardware needs and then have issues (just saying). The premise of BIM in my opinion is also to have it all included, but not everyone is on the same page or level at this point.
    Last edited by bassed; February 15th, 2012 at 08:26 PM.

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    Forum Co-Founder Twiceroadsfool's Avatar
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    <shrug> He asked what the issues were, those are the issues. IMVHO it doesnt even form an excuse, if you are trying to get away with marginal hardware. File SIZE and file PERFORMANCE have a minor correlation, but its not always a causation.

    And FWIW, if i had no template, i would start a file from scratch (no template), not from thr OOTB template.

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    Moderator snowyweston's Avatar
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    If you use legends at all for annotative purposes, you can "save" a good amount of your system family types (dimensions, view titles, and such) from being purged by having them in those... then if you've a template with pre-made sheets, using pre-made views, using pre-made section/elevation types they'll escape the purge as well.

    But yes, purge does seem a little too "i know it all" for it's own good. It would be nice if there was a "can not be purged" parameter for this kind of thing.

  10. #10
    Mr. Revit OpEd
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    Piling on. Unused does not equal NOT needed. If Purged Unused is to be applied at all it should be used VERY selectively and by someone familiar with the overall structure of the project and the office template in use. Most of the time what's really needed is a careful review of the content that's been haphazardly added to a project. Weekly trips through the Project Browser and Families will yield access to the things we may decide we want to get rid of.

    One possible argument FOR "arbitrarily" using it is on external files that will be linked in to our project file. Ideally we get a full copy of their project file so we can examine documentation etc. The actual file (a copy of the original) that gets linked to our project can possibly stand to be reduced in overall content by removing sheets (won't see them anyway, unless you want include them in your drawing schedule?) and unused families and types.

    That written I can't say that I have personally witnessed a remarkable difference in performance with linked files that haven't been stripped and those that have. I've heard anecdotal evidence from various people (primarily RME users) that it's worth doing. I remain a little skeptical, thinking that it is some balance of perception and reality, unless the files were seriously huge to begin with and the removal process substantially reduced the "size" of the project file(s) being linked.

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