"Generate Module Driver" error

Hello,

i had this Alarm message in PCS7 8.2  and i found that the Problem is about Symbols Table.

I  solved the problem by deleting symbols table and creating  it again.

amerelect

i have the same problem and error [ necessary fiels are missing for block CH-AI please note that you have to install exactly the same version of the library as the one this block was imported from ] with a project which i convert it from pcs7 v7 to pcs7 v8.1 with update or from wincc v6.2 to wincc v7.1 by using project maigrator and this error was found while making compiling for all charts and i'm not understand whate do you do [I copiedthe contents of the OLD FB to new FB in new project.. and it's work!!!!!] what do you mean by old fb how to open by wincc V 7.1

and i also not understand [Copy the block that are used in the project from PCS7 v 7.0 library and past it in the project block folde ] what do you mean by project block folder and i will copy all cfc blocks and sfc blocks

please help me and thanks everyone