Well I just tried the project using the files in Mendel_Al_Inv.zip but still the following files can't be found.
I'm new with Inventor so I just might not be doing things right.
ANSI B18.6.4-1_4-20 UNC-1.25(13)CI.ipt
8-18 and 6-40 ipt files
Z Threaded Rod.ipt
X Rod 420.ipt
Y Carriage Mounts Single.ipt
Thanks for your patience, RJ