RKstructure

I think the correct syntaxis should be something like this:

With ListControl
' for a single column list control:
.AddItem valueToBeAssigned

' for a multicolumns list control:
.AddItem pVarItem
.List(.ListCount - 1, #) = Value_# 'where # is number index, and the list could be feeded via a loop
End With


for example, in procedure btnAddmember_Click (on frmTrussMemberProperty), your code looks like:

With Me.lbxMemberProperty
.Additem
.List(.ListCount - 1, 0) = .ListCount
'...some more columns feeded
End With


Where it should be like:

With Me.lbxMemberProperty
.Additem .ListCount
'.List(.ListCount - 1, 0) = .ListCount ' this line is just not needed now
'...some more columns feeded
End With


I really don't understand why you are not getting compiling errors while I do (me on MsOffice 2019 x86, on Win10 x64); but to me your syntaxis is not good in that AddItem issue.
Some guide on List array feeding here: https://www.excelguru.ca/content.php?168-Fill-MultiColumn-Listbox-With-Worksheet-Range

More running errors, feeding the lists from a range can halt some type missmatch error, that could be solved using the .Value or .Value2 attribute, for example on the following userforms (FrmJointcoord, frmMemberProperty, frmTrussSupportdata, frmTrussJointload,...), the UserForm_Initialize procedures are feeding the list control from Excel ranges (use search for: ".List(*) = Sheets", with pattern matching to get all the occurrences)

I had to replace the Replace(Time, ":", "") sentence with Replace(VBA.Time, ":", "") on the ExportReportToword procedure because there is a library declared by you that I could not reach to edit (password locked) and I have not installed on my PC, so it's bugging with the VBA own Scripting library functions.

In the frmTrussMemberProperty userform there is a txtEdit control that does not exists (by I pressume it to be the so called txtEditMem, although not pretty sure about this). Also the ltvMemberProperty does not exists, so I assume the ltvMemberProperty_BeforeLabelEdit and ltvMemberProperty_ItemClick procedures should be commented out (it seems to be a renamed control).

Finally, I could not yet determine which Sheet should be called on DrawingAreaAdd procedure while recalling the AddCoodSystem subprocedure, so I commented out until I guess the right variable value to feed there.

On Sheet9 (ColumnDesign) there is no ColumnDesign procedure declared for PlotChart

Amending the code as stated here will, code compile without errors and the macro file will run perfect.

Kind regards, and very nice work.