Copy-paste fix pattern
fn main() {
string text = "42"
u256 value = parse_u256_or(text, zero)
save value
}Why it happens
A value reached an operator or function that expects a different type.
How to fix it
Convert explicitly, pass the right kind of value, or use the matching helper for strings, arrays, integers, or floats.
Runtime and Studio now show this kind of page from the error dialog: plain message first, stable code second, original details third.