Long time saving a Script

Dear colleagues,

Since i started to work with WinCC v6.2, it happens sometimes that it takes a long time to save a C Script in the Global Script (instead of seconds, it takes 2 or 3 minutes). Meanwhile, we can´t work with the Graphics Designer or any other menu from the WinCC Explorer.
Almost every day i work with WinCC, it does happen. Sometimes, just once and it doesn´t happen again. And sometimes it happens every time so i try to correct it by running the action "reset_wincc.vbs". Sometimes the changes are properly saved but sometimes not. Even more strange is the message that appears sometimes after this long saving time (in the attached file).

Though it´s in spanish, it mainly says that it has occurred a problem while trying to save a file.

Could you please tell me if this has ever happened to you ?

Thank you very much in advance and best regards