ChDir path problem

[grapevine]

I have been using a macro successfully for sometime now, but I have just bought a new machine and I am running W10 and 365 E3 and now the macro will not see the path of the file

The files are all stored in the cloud (Office 365, OneDrive for Business) but are also synced with File Explorer
When i look at the path in Explorer it shows

C:\Users\mkd\OneDrive - Grapevine Computing Ltd\Tutoring\Earnings-MKD\Inv2019-2020

When i look at the properties within Excel it shows
https//grapevinecomputing-my.sharepoint.com/personal/mkd_grapevinecomputing_co_uk/Documents/Tutoring/Earnings-MKD/Inv2019-2020

the file path is used several time in the macro so I added it as a call in via ChDir
I have tried

'FilePath = "C:\Users\mkd\OneDrive - Grapevine Computing Ltd\Tutoring\Earnings-MKD\Inv2019-2020"
FilePath = "//grapevinecomputing-my.sharepoint.com/personal/mkd_grapevinecomputing_co_uk/Documents/Tutoring/Earnings-MKD/Inv2019-2020"
'FilePath = "https//grapevinecomputing-my.sharepoint.com/personal/mkd_grapevinecomputing_co_uk/Documents/Tutoring/Earnings-MKD/Inv2019-2020"

but i cannot get the directory to be found. The first macro is as follows

Sub PDFSave()
   
    ChDir _
        FilePath
   
    ActiveSheet.ExportAsFixedFormat Type:=xlTypePDF, Filename:=FilePath & "\" & InvNum _
    , Quality:=xlQualityStandard, IncludeDocProperties:=True, IgnorePrintAreas _
        :=False, OpenAfterPublish:=False
End Sub

I always get run code 76.
I have tried googling, hence the different attempts at the file path, but I am at a lost as to how i write the file path. Any assistance greatly appreciated, Many thanks

 

[mole999]

if you
Dim test as string
Test = FilePath & "\ " & InvNum

debug print Test as step through to that with F8 and see if it looks right

 

[grapevine]

if you
Dim test as string
Test = FilePath & "\ " & InvNum

debug print Test as step through to that with F8 and see if it looks right

Thank you, i will try that

 

[grapevine]

Unfortunately, it still could see the path, so i actually deleted the ChDir command and it worked ok using the full https: line.
Many thanks