draw a retangle 100x50mm, use edge flange/miter flange, chose flange position: material inside, flange overall length 17mm, form a box, then flatten and get all dimensions.

then creat new drawing and I use all the dimension of the flat pattern to make a sheetmetal part, and sketch bend lines using the same dimension as given from last drawing, it gives me a error message, say " failed to make the sketch bend "

how it happened?  both drawing used same bend allowance, radius, tear relief and meterial thickness, edge flange can make the box, sketched bend can not