You have 2 options,
1) Create new formula, lets say CurDateNum and place below formula to convert current Date to Number
tonumber(totext(currentdate,'yyyyMMdd'))
Then in Report Filter put condition
@CurDateNum = {WOC_REASON.OTTRND}
Or
2) Create a new formula, lets say DateOTTRND and place below formula to convert OTTRND to Date
Date(Mid (CStr ({WOC_REASON.OTTRND}),6 ,1 )& Mid (CStr ({WOC_REASON.OTTRND}),8 ,1 )&
"/" &
Mid (CStr ({WOC_REASON.OTTRND}),9 ,2 ) &
"/" &
Mid (CStr ({WOC_REASON.OTTRND}),1 ,2 )& Mid (CStr ({WOC_REASON.OTTRND}),4 ,2 )
)
Then in Report filter place condition
@DateOTTRND = CurrentDate
Note:
-> Your formula looks correct except, you didn't converted from string to Date