One issue that I have encountered is that if I go into the load function and realize that I have the wrong units specified, I cannot change the units by going back to the geometry menus and selecting the correct units to use. When I enter the loading menus again, the units have not changed. Is there another way to change the units once you enter the loading functions?
From the Edit menu, choose Edit Input Command File. Scroll down till you see commands like
Prior to the load case which has the units error, add the appropriate unit as shown
UNIT POUND FEET
UNIT KIP FEETLOAD 1SELF Y -1.0MEMBER LOAD1 TO 25 UNI GY -0.2UNIT POUNDLOAD 2JOINT LOAD33 FX 400UNIT KNS METERLOAD 3MEMBER LOAD45 UNI GY -3.0