PCS7 compilation error, please help!!!

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This project has been operating normally for two or three years now; recently there were some changes in the process, so the program also needed to be modified. A few days ago, I changed two CFCs and added two SFCs, but compilation failed. The error messages are as follows: Log: Compile Filter: Responsible user: Administrator Compiling changes to the charts as program SIMATIC 400(1)\CPU 416-3 PN/DP\S7 Program(1) on 2012-04-01 14:58:49 Generate block drivers: on Generating SCL sources: off Set sampling times from 2012-04-01 14:59:02 Setting sampling times completed: 2012-04-01 14:59:03. E: FC774 is outside the user range E: FC776 is outside the user range Error messages from the SCL compilers during generation of the FC776 block E: E: L 00054 C 00028: Invalid structured data, data block, or instance access. E: E: L 00054 C 00028: Invalid variable; period not allowed. E: E: L 00057 C 00027: Invalid structured data, data block, or instance access. E: E: L 00057 C 00027: Invalid variable; period not allowed. E: E: L 00058 C 00026: Invalid structured data, data block, or instance access. E: E: L 00058 C 00026: Invalid variable; period not allowed. E: E: L 00065 C 00031: Invalid structured data, data block, or instance access. E: E: L 00065 C 00031: Invalid variable; period not allowed. E: E: L 00066 C 00044: Invalid structured data, data block, or instance access. E: E: L 00066 C 00044: Invalid variable; period not allowed. E: E: L 00124 C 00028: Invalid structured data, data block, or instance access. E: E: L 00124 C 00028: Invalid variable; period not allowed. W: W: Code generator not called because of an error. W: OP10CFC(2)(1) 80 blocks are inserted in the runtime group in OB35. This can lead to problems during compiling with the SCL compiler. W: In OB35 there are 362 blocks / runtime groups / SFC charts installed. This can lead to problems when compiling with the SCL compiler. W: In OB100 there are 221 blocks / runtime groups / SFC charts installed. This can lead to problems when compiling with the SCL compiler. End of code generator: 2012-04-01 14:59:51 14 error(s) and 4 warning(s) found