Getting below mentioned error while generating Validation report from .dwg file

[unity_nihals]

Please select the paper size (1.A0/2.A1/3.A2/4.A0_200) <1>2
"adjecent 39.46"
"Opposite 32.36"
"0.74"
Inserting Sheet ....
"adjecent 85.35"
"Opposite 59.40"
Please wait..generating propossal type
Command name is <Test> :
"num : 130.340"
"130.34"
"130.34"
"130.34" ; error: bad argument type: stringp nil