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CAD tip CAD tip # 6119:

   
Question CAD 
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Q - question

Lost dynamic properties (grips) of dynamic blocks.

A - answer Some dynamic blocks inserted in a drawing may be displayed without their manipulators - grips - so you cannot use their dynamic properties (parameters, behavior, visibility states).

This problem is usually caused by:

  1. Inserting the dynamic block with non-uniform scale X-Y-Z (different scales in the individual axes) -- such blocks cannot make use of the dynamic functions
  2. Non-standard edit or transform operation on the block - e.g. with an add-on application (which does not count with "dynamic" versions of blocks)
  3. Nesting dynamic block inside another block or xref
  4. Processing DWG files in a non-Autodesk application -- applications like IntelliCAD, ZwCAD, ProgeCAD, Microstation, DWG Editor, etc. do not work with the official (genuine) DWG format and they may damage the drawing contents
  5. Saving the drawing to a too old DWG or DXF format (e.g. R14) and reading it back
  6. Rotate/align - rotation (or other transformation) of a dynamic block located on very large coordinates may cause rounding errors which result in temporary loss of its dynamic functions
In cases 2. and 6. you can solve the problem with the CADstudio DynReset utility - see Download. This utility restores the dynamic grips in most situations caused by internal settings of a dynamic block.

The LISP application DynReset also checks system variables which may suppress grip display.

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See also:
Tip 13156:Insert or update a specific block from another DWG drawing.
Tip 13006:Calculated property descriptions (tobogan slide from floor to floor)
Tip 13000:Labels of dimensional parameter values in dynamic blocks (parameters->attributes)
Tip 12685:ReLinkField - re-link fields to source objects.
Tip 12616:Att2elev - move block to elevation specified by its attribute.


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