Which patching process showed the unknown filesize error?
Please list which patching process showed the error (CP, SWAP, SWDL)

I do CP Patch

What is your firmware?
I have updated to MST2_EU_VW_ZR_P0249T
then i Install toolbox
and wanted to apply [CP-Patch]

or should i update to version P0254T?

Attach the support-dump as .zip file
Go to Tools -> Dump necessary files to SD folder /dump/.../support and zip the support folder
(

support.zip

)