A configuration variable exists that can give you the ability to edit V7 design files in MicroStation V8 without upgrading them to V8 DGN format. MS_OPENV7 can be set to the following values:
#------------------------------------------------------------------------------- # # MicroStation V7 file open options (MS_OPENV7): # # 0 => the current upgrade to V8 DGN or open read-only dialog. This is also true # if MS_OPENV7 is undefined or defined as anything other than 1, 2, or 3. # 1 => upgrade V7 to V8, no alert dialog # 2 => open V7 as read-only, no alert dialog # 3 => open V7 for write and set workmode to V7, no alert dialog # #-------------------------------------------------------------------------------
The implementation through a configuration variable allows the administrator to enforce a policy for handling pre-V8 DGN files.
This working environment, or workmode, sets a collection of capability mask variables that either add or subtract certain capabilities in MicroStation. The V7 workmode removes a number of capabilities -- you can find a complete list of the capability variables in the delivered ..\Program\MicroStation\config\system\workmode.cfg file.
If MS_OPENV7 is set to 3, you are put in the V7 workmode when a V7 file is opened for editing. This workmode attempts to protect you from making additions or changes to the design which are not backward compatible to V7 (for example, creating models). Note that the V7 format does not allow incremental saves, so you must manually save your changes as there is no autosave feature when editing in V7 workmode.
NOTE: Even in V7 workmode Cell Libraries are converted to V8 format.
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