Material table error in drawing ?

i recevied a drawing file which has a table containing different materials, i part model there are configurations based on the material.

when i try to edit the table i recivied error "class not regeristed"

is it related to any program or is there any tip for removing that error and can edit the table properties.

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I found the solution it is only that PC donot have MS office installed when it MS office was installed in PC the design table was editable.

 
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