While Wend condition

[ravi.gajul]

Looks like there is a space in one of the variables value and so is the result -1
Please try

Code:

while strcomp (cstr(trim(eempid)),cstr(trim(empid)))=0

the control enters the while loop and continues as condition always returns 0 if both the values compared are same.Hence some where inside the loop ,change the value of empid or eempid to fail the condition and thus exit the loop.