Error: pystack exhausted

[NikhilMunda]

First, I would like to appreciate your work. Thank you for making OverQuack. It is awesome in its own way. I am facing some problem, I hope there is some work around. I am using Pico W. Whenever using function or conditions like if, while it just show Error: pystack exhausted. Even for a simple code. The file name condition.oqs
$A = 5
$B = 2
IF$A>$B
STRINGLN $A
ELSE
STRINGLN $B
END_IF

Error get in putty serial:

POST_DATA: FREE_MEM
POST_DATA: WRITE<=|^w^|=>condition.oqs<=|^w^|=>
$A = 5
$B = 2
IF$A>$B
STRING $A
ELSE
STRING $B
END_IF

data: ['WRITE', 'condition.oqs', '\n$A = 5\n$B = 2\nIF$A>$B\n STRING $A\nELSE\n STRING $B\nEND_IF\n']
POST_DATA: LS
POST_DATA: READ<=|^w^|=>condition.oqs
data: ['READ', 'condition.oqs']
POST_DATA: RUN<=|^w^|=>condition.oqs
data: ['RUN', 'condition.oqs']
[RUN] Injecting Keystrokes from "condition.oqs"
free_memory: 108336, allocated_memory: 70672
[LINE] $A = 5
[RANDOM_DEBUG] Expression "5" not in "RNG_VARIABLES_LIST" = [
$_RANDOM_NUMBER,
$_RANDOM_LOWERCASE_LETTER,
$_RANDOM_UPPERCASE_LETTER,
$_RANDOM_LETTER,
$_RANDOM_SPECIAL,
$_RANDOM_CHAR
]
[DEBUG] expression: 5,
[0_EVALUATE_EXPRESION] BEGIN, expression: "5"
[1_EVALUATE_EXPRESION] BEGIN, expression: "5"
[2_EVALUATE_EXPRESION] expression: "5", result "5"
[VARIABLE_ASSIGNING] variable: $A, value: 5
free_memory: 108256, allocated_memory: 70752
[LINE] $B = 2
[RANDOM_DEBUG] Expression "2" not in "RNG_VARIABLES_LIST" = [
$_RANDOM_NUMBER,
$_RANDOM_LOWERCASE_LETTER,
$_RANDOM_UPPERCASE_LETTER,
$_RANDOM_LETTER,
$_RANDOM_SPECIAL,
$_RANDOM_CHAR
]
[DEBUG] expression: 2,
[0_EVALUATE_EXPRESION] BEGIN, expression: "2"
[1_EVALUATE_EXPRESION] BEGIN, expression: "2"
[2_EVALUATE_EXPRESION] expression: "2", result "2"
[VARIABLE_ASSIGNING] variable: $B, value: 2
free_memory: 108192, allocated_memory: 70816
[LINE] IF$A>$B
[IF_STATEMENT_START] line=IF$A>$B, condition=$A>$B
[RANDOM_DEBUG] Expression "5>2" not in "RNG_VARIABLES_LIST" = [
$_RANDOM_NUMBER,
$_RANDOM_LOWERCASE_LETTER,
$_RANDOM_UPPERCASE_LETTER,
$_RANDOM_LETTER,
$_RANDOM_SPECIAL,
$_RANDOM_CHAR
]
[IF_STATEMENT_START] line=IF$A>$B, condition_replaced=5>2
[1_EVALUATE_EXPRESION] BEGIN, expression: "5>2"
[2_EVALUATE_EXPRESION] expression: "5>2", result "True"
Error: pystack exhausted
[CONDITION.OQS_COMPLETED] 200