May occur when setup time is negative or when there are too many schemes to be followed.

http://www.google.co.in/url?q=http://www-vlsi.stanford.edu/~dliu/paper/iccd_02.pdf&sa=U&ved=0CBMQFjAEOFBqFQoTCNyU7a3d8scCFZAFjgodL3UARg&usg=AFQjCNFalrh657Wfcx5MVW6tsFvAHLxI2A

http://www.google.co.in/url?q=http://www.imsc.res.in/~sudeshna/Rapid_07.pdf&sa=U&ved=0CBUQFjAFOFBqFQoTCNyU7a3d8scCFZAFjgodL3UARg&usg=AFQjCNGTbJStQnUPEChLXfRWT5AIvvkksQ

Dear Prof Abhijit, at this moment RG is experiencing some 'technical issues' that will be fixed as soon as they can.  Calculation of scores is the only function that has 'become static', I believe.  But some of us are not on RG for its scores.  I am here to collaborate with certain people who think in the same manner.  Have a good day.

There may be few reasons as under:

1. Up gradation of the RG site as the team mentioned:

Please see the note pasted on RG site by RG committee:

Please note: We are currently working on enriching publications with more data. You may notice a few changes to your RG Score as a result.

2. There may be technical error as technology used to fail sometimes.

3. May be holiday period.

4. Etc. ... !

Dear Subhash, that note posted by RG has been put there for more than a month.  But the 'technical issues' have been just a shorter period.  It was Hussein Elasrag who wrote to RG community support and confirmed that it was just technical problems that caused RG to be unable to perform just one function.  RG asks for patience.  See Hussein's post #29 on this thread.

https://www.researchgate.net/post/I_notice_that_RG_score_has_not_changed_this_week_Can_anyone_tell_me_what_happened

Dear sirs.

I don't much care for this transitory RG crash on scores updates.

We should not be dependent on scores to proceed with our participation on RG. We all take profit from coming here. Either to collect information or to communiceate and exchange our ideas.and take to interesting direct contacts with colleagues on our fields of interest.

I might even feel more  free to think and to relate with others if there were no scores...

7 million participants is a whole lot to analyse weekly... Maybe they should better analyse us on monthly basis... (I don't mind. I don't much apreciate being analysed by nonpeers, anyway, much less by a cold anonymous computer system...)

Whichever GATE may be..................yours cannot be static as you are highly dynamic.

Please refer following thread page 3 

https://www.researchgate.net/post/I_notice_that_RG_score_has_not_changed_this_week_Can_anyone_tell_me_what_happened/3

RG Support has responded to a query from Hussein Elasrag  

Dear Hussein,

Thanks for getting in touch. We've been experiencing some technical issues that should be fixed soon. Please accept our apologies for the inconvenience, and thank you for your patience.

Kind regards,

Phillippa

RG Community Support

Thanks to all - for sparing your valuable time beyond your area of interest/research

Calculation of scores is  not the only function that has 'become static', but also the number of publication views by institution.

You should not worry too much dear Abhijit about possible technical problems RG may have. After all no one is perfect and many issues need to be addressed to make the system better. Everyone should continue their interactions for mutual benefits while the system exists.

The valuable answers on the question.https://www.researchgate.net/post/I_notice_that_RG_score_has_not_changed_this_week_Can_anyone_tell_me_what_happened

Sometime RG team up grade the RG platform and modify the set up.