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You can call DWG Diff from a command line or script and pass in filenames for the A and B drawings as well as output filenames.

 

The following is the command line usage:

 

dwgdiff.exe a="<Your A DrawingFilePath>" b="<Your B DrawingFilePath>" m=[i]mmediate | m=[w]ait | m=[s]ilent

 

a="<Your A DrawingFilePath>" - this is required if you are passing in variables to the command line.

b="<Your B DrawingFilePath>" - this is required if you are passing in variables to the command line.

m=[i]mmediate | m=[w]ait | m=[s]ilent - required.

opA="<Diffed Output Filename and Path A not B>" - Optional Output File.

opB="<Diffed Output Filename and Path B not A>" - Optional Output File.

opC="<Diffed Output Filename and Path Common>" - Optional Output File.

 

a=, b=, op=A, opB=, opC= should be quoted strings if the file paths contain spaces. They should also contain fully qualified file names with extensions.

 

The variable order is not important.

 

MODES

m=s opens drawings calculates differences and outputs any of opA, opB, or opC if any; also runs silently without the user interface being shown.

m=i will immediately calculate differences.

m=w will wait for you to click Tools>Calculate Differences once DWG Diff is open.

both m=i or m=w show the user interface.

 

EXAMPLES

 

Open two drawings and calculate the differences:

dwgdiff.exe a="c:\my a drawing.dwg" b="c:\my b drawing.dwg" m=i

 

Open two drawings and show the user interface and wait for you to press Tools>Calculate Differences:

dwgdiff.exe a="c:\my a drawing.dwg" b="c:\my b drawing.dwg" m=w

 

Open two drawings, calc diffs and write out the AnotB differences. Does not show UI.

dwgdiff.exe a="c:\my a drawing.dwg" b="c:\my b drawing.dwg" m=s opA="c:\my Output A Drawing.dwg"

 

Open two drawings, calc diffs and write out the AnotB, BnotA and Common drawings. Does not show UI.

dwgdiff.exe a="c:\my a drawing.dwg" b="c:\my b drawing.dwg" m=s opA="c:\my Output A Drawing.dwg" opB="c:\my Output B Drawing.dwg" opC="c:\my Output Common Drawing.dwg"