Class with iCustom return ZERO values, yet indicator is showing calculated values !!!

Anil Varma -  

NOTE: Surprisingly, it has just started showing calculated values when I have close the CLASS and EA Files in MQL Editor !!!

Dear Members

Please help me to locate the problem in the code, why Class PercentB_MFI is returning ZERO values, where as PercentB_BB is working perfectly fine. Screenshot attached.

Indicator Code for MFI, which displays calculated values in chart.