Locktime requirement not satisfied when locktime set to 1 in p2sh

[subredwes]

Hey there!

I've created the following script on testnet:

OP_IF
    2 <pubkey1> <pubkey2> <pubkey3> 3
    OP_CHECKMULTISIG
OP_ELSE
    1 OP_CHECKSEQUENCEVERIFY
    OP_DROP
    <pubkey1> OP_CHECKSIG
OP_ENDIF

I am currently able to unlock the funds when I satisfy the 2 of 3 multisig condition.

However, when I attempt to unlock the funds using the else condition, I get the following error: 64: non-mandatory-script-verify-flag (Locktime requirement not satisfied)

This confuses me, because I thought I was setting the lock time to a block height of 1, which should have already passed.

Any help on this would be greatly appreciated! Thanks so much!

[pebwindkraft]

This confuses me, because I thought I was setting the lock time to a block height of 1, which should have already passed.

You talk about the last field in a tx (nLockTime), or the stack item before the CSV command?
I think that nLockTime must not be set to the „relative“ block height of one... could you show the raw tax, so far as you got? The wiki explains to set nLockTime field to a higher value than the stack element for CSV, see here:
https://en.bitcoin.it/wiki/Script
I meant I read somewhere (just can‘t find the link), that LockTime cannot be the default „ffffffff“, it must be s.th. else.