What happened to you is after scale, although the drawing scale went down but the dimension global scale (known as global dimscale) was not cause dimensions are controlled by a dimension style and each scaled drawing need to have it own dimension style. that's means if you draw a new dimension on it you will get a measure of 5000 but it's not?!
for example if your drawing is in mm and it is scaled to 1:50 and you want it in 1:100? you plot it at 1=100 plot ratio (of course there is need to fix the annotative objects to the new scale)īy doing a scale of 0.5 (for example) you took a measured line of 10000mm and made it 5000mm. instead you should plot it at the right scale. In AutoCAD Model tab (space) to have a drawing in another scale does not require scaling.