[JW Lua] Help with understanding an error message needed

[Jan Angermüller]

The Staff name is the (main) name of the staff.
If a staff has several instruments you might need FCInstrumentDef.
If the instrument changes you may also need to check staff styles with 
instrument changes.

Jan

Am 14.05.2016 um 13:09 schrieb Robert Wildling:
> Hi,
>
> a script loops over all staves of a score and logs some message to the 
> console about found attributes, among them the staff's full name. But 
> 2 weird things happen:
>
> 1. it lists empty entries and I have no idea, where they come from. In 
> one case, there was an instrument change (and it seems this script 
> cannot read a staff name of an instrument change staff...) and two 
> others from a multi-staff instrument (harp). But still there are 5 
> more logs of staves that have no name and are not in the score. I even 
> tried to DeepDelete them, but to no avail...
> Is it possible that Finale remembers staves that were in the score at 
> some earlier stage, but were deleted via ScoreManager at a later point?
>
> 2. The function is called like this: loadStaves(30). Depending on 
> whether there is an attribute sent along, the script decides if it 
> should loop over all staves (id == nil ... LoadAll() .. ) or over the 
> specific one ( Load(id) ). But the "found id" part of the script 
> throws this error:
>
> -- This function and ..."]:41: attempt to call method 'Load' (a nil value)
>
> According to the Class browser, though, the syntax is correct. 
> Nevertheless, the Load method  will not even accept a number that is 
> entered manually...
>
> Any ideas what I am doing wrong here?
> Thanks!
> Robert
>
>
> This is the script:
>
> ****************************
> function loadStaves( id )
>     local staffNameFull = finale.FCString()
>     local staffNameAbbr = finale.FCString()
>
>     if ( id == nil )  then
>         print ( "ID = not given, so get all staves")
>         local staves = finale.FCStaves()
>         staves:LoadAll()
>
>         for staff in each(staves) do
>             staffNameFull = staff:CreateTrimmedFullNameString()
>             staffNameAbbr = staff:CreateTrimmedAbbreviatedNameString()
>             print("ItemNo: ", staff:GetItemNo(),
>                     " ---> Staff name full: ", staffNameFull.LuaString,
>                     " - abbr: ", staffNameAbbr.LuaString
>             )
>
>             if ( staffNameFull.LuaString == ""
>                  and staffNameAbbr.LuaString == ""
>                  and staff:GetItemNo() == 30)
>             then
>                 print("  empty... delete this... or not?");
>                 local bool = staff:DeepDeleteData()
>                 print(bool)
> staves:SaveAll()
>             end
>         end
>
>    else
>        print("ID = ", id, ", process only that staff, type = ", type(id))
>      local staff = finale.FCStaves();
>        if staff:Load(id) then
>            staffNameFull = staff:CreateTrimmedFullNameString()
>            staffNameAbbr = staff:CreateTrimmedAbbreviatedNameString()
>          print("Staff name full: ", staffNameFull.LuaString, " - abbr: 
> ", staffNameAbbr.LuaString )
>         end
>     end
> end -- end function loadStaff
>
> loadStaves(29)
> ************************************
>
>
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