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    <title>idea Revision - &amp;quot;alphanumeric&amp;quot; - by Sheets - is unhandable... en Revit Ideas</title>
    <link>https://forums.autodesk.com/t5/revit-ideas/revision-quot-alphanumeric-quot-by-sheets-is-unhandable/idi-p/11152689</link>
    <description>&lt;P&gt;We made a "alphanumeric"-list&amp;nbsp; for the way, we use to revision sheets in the region DACH.&lt;/P&gt;&lt;P&gt;(See enclosed example)&lt;/P&gt;&lt;P&gt;First issue is "_", then A, B,... Z, AA, AB, AC...&lt;/P&gt;&lt;P&gt;That can be done with the manual defined list... that's nice and easy...&lt;/P&gt;&lt;P&gt;1. premis: we do numbering by sheet&lt;/P&gt;&lt;P&gt;2. premis: from our usage we know, that we need max.&amp;nbsp; 29, 30 revision on one sheet... but our defined "alphanumeric" has 40 elements, so planty left to not run into troubles.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;BUT now the way Revit works:&lt;/P&gt;&lt;P&gt;Imagine you've got 41 sheets issued in the first revision - which is the string "_" , that means I used 41 sequences. And "_" is far away from revision "AM" but then when trying to make a new sequence - no matter if I wanna make a new sheet or at one of the existing sheets a new revision I get this message:&lt;/P&gt;&lt;P class="lia-indent-padding-left-30px"&gt;&lt;EM&gt;Error - cantnot be ignored:&lt;/EM&gt;&lt;/P&gt;&lt;P class="lia-indent-padding-left-30px"&gt;Revision Number "AA" is used more than once.&lt;/P&gt;&lt;P&gt;So what's the problem... well as I'm trying to create sequence #41, the system is counting "_,A,B...Z, AA, AB,....,AN,AM" these are 40, 41st is "__" and now 42nd would be AA which is already sequence 28... but not used on one sheet.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Feedback from the development-team:&lt;/P&gt;&lt;P&gt;That's not an issue, that's a feature.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;So we're having at some stages more than hundred sheets in one RVT-File... so our customized numbering ist a list with more than 1.200 elements... for at least rising an everage revision level of 10&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
    <pubDate>Fri, 06 May 2022 15:20:12 GMT</pubDate>
    <dc:creator>Stefan_Wolf_WST</dc:creator>
    <dc:date>2022-05-06T15:20:12Z</dc:date>
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      <title>Revision - "alphanumeric" - by Sheets - is unhandable...</title>
      <link>https://forums.autodesk.com/t5/revit-ideas/revision-quot-alphanumeric-quot-by-sheets-is-unhandable/idi-p/11152689</link>
      <description>&lt;P&gt;We made a "alphanumeric"-list&amp;nbsp; for the way, we use to revision sheets in the region DACH.&lt;/P&gt;&lt;P&gt;(See enclosed example)&lt;/P&gt;&lt;P&gt;First issue is "_", then A, B,... Z, AA, AB, AC...&lt;/P&gt;&lt;P&gt;That can be done with the manual defined list... that's nice and easy...&lt;/P&gt;&lt;P&gt;1. premis: we do numbering by sheet&lt;/P&gt;&lt;P&gt;2. premis: from our usage we know, that we need max.&amp;nbsp; 29, 30 revision on one sheet... but our defined "alphanumeric" has 40 elements, so planty left to not run into troubles.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;BUT now the way Revit works:&lt;/P&gt;&lt;P&gt;Imagine you've got 41 sheets issued in the first revision - which is the string "_" , that means I used 41 sequences. And "_" is far away from revision "AM" but then when trying to make a new sequence - no matter if I wanna make a new sheet or at one of the existing sheets a new revision I get this message:&lt;/P&gt;&lt;P class="lia-indent-padding-left-30px"&gt;&lt;EM&gt;Error - cantnot be ignored:&lt;/EM&gt;&lt;/P&gt;&lt;P class="lia-indent-padding-left-30px"&gt;Revision Number "AA" is used more than once.&lt;/P&gt;&lt;P&gt;So what's the problem... well as I'm trying to create sequence #41, the system is counting "_,A,B...Z, AA, AB,....,AN,AM" these are 40, 41st is "__" and now 42nd would be AA which is already sequence 28... but not used on one sheet.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Feedback from the development-team:&lt;/P&gt;&lt;P&gt;That's not an issue, that's a feature.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;So we're having at some stages more than hundred sheets in one RVT-File... so our customized numbering ist a list with more than 1.200 elements... for at least rising an everage revision level of 10&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Fri, 06 May 2022 15:20:12 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/revit-ideas/revision-quot-alphanumeric-quot-by-sheets-is-unhandable/idi-p/11152689</guid>
      <dc:creator>Stefan_Wolf_WST</dc:creator>
      <dc:date>2022-05-06T15:20:12Z</dc:date>
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