non alphabetic string variable names when used after # in condition causes error: Expected __IDENTIFIER__ and found __INT_NUMBER__

[laynr]

running:
./yago fileName ./Occurrences.yara

where Occurrences.yara is:

rule Occurrences
{
    strings:
        $1 = "dummy1"

    condition:
        for all i in (1..#1) : (@1[i] < 100)
}

results in error:
Expected IDENTIFIER and found INT_NUMBER

Note: Change string name to $a and condition #a works