substring in crystal reports 2008 formulas

hi

i want only the 3 first characters in my report , i use formulas but have an error
i have this
for this field
BCCDAHFFD
left({P1011.codigo},1,3)
the result i need
is BCC
thank you a lot
ErnestoAsked:
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ErnestoAuthor Commented:
or

mid({P1011.codigo}1,3)
but give me an error
0
JayConverseCommented:
left({P1011.codigo},3)

or

mid({P1011.codigo},1,3)
0

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JayConverseCommented:
What's the error?  Is {P1011.codigo} a string?
0
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