Global Variables disappear

 
Once a week or so my Global Variables get lost. They work fine then all of a sudden on the chart in my comments where I display them they go to GV = 0 and if I open the Global Variables drop down menu in MT4 under Tools no global variables are shown at all..... Anyone seen this before??
 
Global variables are kept in the client terminal within 4 weeks since the last access, then they will be deleted automatically. An access to a global variable is not only setting of a new value, but reading of the global variable value, as well.
 
phy:
Global variables are kept in the client terminal within 4 weeks since the last access, then they will be deleted automatically. An access to a global variable is not only setting of a new value, but reading of the global variable value, as well.

Hi Phy...Yes that's why I don't understand why they disappear occasionally... they get read every tick.... occasionally wrote 10 to 15 times a day.... and zeroed only when I have zero orders open.