crystal report if statement

I've got the following statement, but nothing comes out:

Local stringvar sResult := "";

If Length({TB1.FLD1}) > 0 then
    sResult := {TB1.FLD1} & Chr(13);

If Length({TB1.FLD1}) > 0 then
    sResult := sResult & {TB1.FLD2} & Chr(13);

If Length({TB1.FLD3}) > 0 then
    sResult := sResult & {TB1.FLD3} & Chr(13);

sResult := sResult & {TB1.FLD4} & " " & {TB1.FLD5} & " "& {TB1.FLD6};
sResult
jessica00Asked:
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EwaldLCommented:
could it be that one of the fields has a null value? if so, have a look at this
http://support.crystaldecisions.com/library/kbase/articles/c2000247.asp

Or try try setting "Convert null values to default" in the report options.
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mlmccCommented:
Is the field on the report tall enough to handle the field?

Is CAN GROW set?

Format the field
Check CAN GROW

mlmcc
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jessica00Author Commented:
IsNull works perfect, I won't use Length() in this case any more
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mlmccCommented:
For future reference a NULL doesn't have a length so the value is not defined.

mlmcc
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