htc desire 816 flash fail

when i am trying to flash with box then show this error

Starting flash process…
Execution time is 0(ms)
sending ‘zip’… (1293372 KB) FAIL02 data length is too large
FAILED (data size is too large(1293372 KB) for device to download ZIP file ‘C:\Users\bachelor dOt com\Downloads\Programs\RUU_A5_CHL_L50_DESIRE_SENSE 60_MR_Sprint_WWE_VM_)
Flash process completed.

and also when i run RUU and select accept but ruu exe not running