CheckedSubOverflow
Raydium AMM V4 · Custom(32) · 0x20
custom program error: 0x20
What it means
An arithmetic operation inside the program went out of range. In exchanges this usually means the amount, price or liquidity at that moment produced a number the pool cannot represent, often a trade far larger than the pool can absorb.
The program's own message: “Checked_Sub Overflow”
What to do
The error name is the program's own diagnosis. Paste the failed transaction into TxWhy to see which instruction raised it and with which accounts.
Have the transaction that failed with this?
Paste its signature. TxWhy shows the exact instruction and inner call that raised the error, and rebuilds the transaction when the cause is one it can fix (compute limit, expired blockhash, priority fee, stale swap quote).
Code 32 means something else in other programs
Custom codes are private to each program. Check which program actually raised it: it is the innermost failed call, not necessarily the program you called.