This compiler error will occur if the expression that follows a while reserved word is not a boolean expression. The examples below would cause this error to occur:

while n_TokenDate // integer !!!
endwhile
 
while EvalToken(n_TokenDate, 'm') // string !!!
endwhile

Note, however, that what follows the reserved word while can be a complex expression, as long as its result is boolean.

nCurDate = n_TokenDate
while EvalToken(nCurDate,'[m]') == '1'
    inc(nCurDate)
endwhile

In the above example, the loop runs until the evaluation of the token [m] on that date no longer translates into the string '1' (ie. it is no longer in January).

Topic 109016, last updated on 18-Apr-2020