How to fix trainz rolling stock with 0kb showing update

[Sorebutt]

Hi guys. yesterday i run a request for help how to fix rolling stock with 0kbs showing. now my contents show the proper CDP file and the proper kbs.
but when i try to install any contents i get this. Unable to open trainz contents cdp for reading. doze any one know how to repair this. or if there is a program to fix these. Thank you. ps I have payware engines that i can.t install. please help. Thanks again

 

[JCitron]

That's a sign the file is corrupted. You may want to exclude your Trainz program and data folder from your antivirus. There's a possibility that your antivirus program is stomping on and corrupting the data.