How to upgrade program?

Question

Trying to upgrade a program I constantly bump into the following error:

$ solana program deploy ./target/deploy/c003_low_level.so 
=============================================================================
Recover the intermediate account's ephemeral keypair file with
`solana-keygen recover` and the following 12-word seed phrase:
=============================================================================

=============================================================================
To resume a deploy, pass the recovered keypair as the
[BUFFER_SIGNER] to `solana program deploy` or `solana program write-buffer'.
Or to recover the account's lamports, pass it as the
[BUFFER_ACCOUNT_ADDRESS] argument to `solana program close`.
=============================================================================
Error: Deploying program failed: Error processing Instruction 0: account data too small for instruction

I have tried to pass the printed-out seed phrase as --program-id ASK

But it just generate a brand new seed phrase:

$ solana program deploy ./target/deploy/c003_low_level.so  --program-id ASK
[program_id] seed phrase: 
[program_id] If this seed phrase has an associated passphrase, enter it now. Otherwise, press ENTER to continue: 
==========================================================================
Recover the intermediate account's ephemeral keypair file with
`solana-keygen recover` and the following 12-word seed phrase:
==========================================================================

==========================================================================
To resume a deploy, pass the recovered keypair as the
[BUFFER_SIGNER] to `solana program deploy` or `solana program write-buffer'.
Or to recover the account's lamports, pass it as the
[BUFFER_ACCOUNT_ADDRESS] argument to `solana program close`.
==========================================================================
Error: Deploying program failed: Error processing Instruction 0: custom program error: 0x0

I tried to use solana program write-buffer it returns an address, but I'm puzzled how to use it.

Answer 1

The error Error processing Instruction 0: custom program error: 0x0 usually means that you don't have a big enough account to hold your programs.

When programs are deployed today, space is only allocated to be double the first program's size you deploy. If you go past that during an upgrade, you'll run into this issue.