not able to select tools in DMU kinematics and wireframe and surface design workbenches

i m using window 10 CATIA v5 r21.i'm showing screenshot of DMU kinematic. is there any special setting for that ? HELP ME .

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3 Answers

after looking at your screen shoot i have come to two conclusion for your problem......first pls select the part properly u want to apply the operation and second if this problem remains pls reinstall your software

 
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I actually got soln . I have mistakenly change small scale in option which I corrected by changing it to standard scale. By the way thanks for answering.

 
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well thts good to kmow....;)
keep asking question about your doubts...;)

 
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