st: if in loop not working

[Paula Smith <paulas@srl.cam.ac.uk>]

Hi,

I'm having trouble with this bit of code and am wondering if anyone can 
help me. The 'if' within the loop if causing the program to stall and 
I'm getting an 'if not found' error.

gen t = 20 if agecat == 1
replace t = 5 if agecat >= 2 & agecat <= 11
replace t = 10 if agecat == 12
gen s = .
gen r = .
gen q = .
gen p = .

qui forvalues t = 1/12 {
    replace s = `s`t'' if agecat == `t'
    replace r = `r`t'' if agecat == `t'
    replace q = `q`t'' if agecat == `t'
    replace p = `p`t'' if agecat == `t'
}
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