problem: When using sendtoaddress, an exception occurred: -32603: insufficient funds available to construct transaction

[WarriorFromLongAgo]

btcd run

.\btcd.exe --configfile=.\btcd.conf --miningaddr=SQW4z4BsNZKR42GP1752JqjEiG91PuFa3R

2024-10-09 17:13:02.457 [INF] BTCD: Version 0.24.2-beta
2024-10-09 17:13:02.461 [INF] BTCD: Loading block database from 'C:\Users\65126\AppData\Local\Btcd\data\simnet\blocks_ffldb'
2024-10-09 17:13:02.466 [INF] BCDB: Detected unclean shutdown - Repairing...
2024-10-09 17:13:02.467 [INF] BCDB: Database sync complete
2024-10-09 17:13:02.467 [INF] BTCD: Block database loaded
2024-10-09 17:13:02.475 [INF] INDX: Committed filter index is enabled
2024-10-09 17:13:02.476 [INF] CHAN: Pre-alloacting for 251 MiB
2024-10-09 17:13:02.476 [INF] CHAN: Loading block index...
2024-10-09 17:13:02.478 [INF] CHAN: Chain state (height 26, hash 21b5486c9041c15f9ab09b5dd101c1077195c817a866f8b55bd3e390af82b30b, totaltx 27, work 54)
2024-10-09 17:13:02.481 [INF] RPCS: RPC server listening on 127.0.0.1:18556
2024-10-09 17:13:02.482 [INF] AMGR: Loaded 0 addresses from file 'C:\Users\65126\AppData\Local\Btcd\data\simnet\peers.json'
2024-10-09 17:13:02.482 [INF] CMGR: Server listening on [::]:18555
2024-10-09 17:13:02.482 [INF] CMGR: Server listening on 0.0.0.0:18555
2024-10-09 17:13:21.648 [INF] RPCS: New websocket client 127.0.0.1:53080

btcwallet run

btcwallet --configfile=.\btcwallet.conf --simnet

2024-10-09 17:25:11.364 [INF] BTCW: Version 0.15.1-alpha
2024-10-09 17:25:11.368 [INF] BTCW: Generating TLS certificates...
2024-10-09 17:25:11.377 [INF] BTCW: Done generating TLS certificates
2024-10-09 17:25:11.377 [INF] RPCS: Listening on 127.0.0.1:18554
2024-10-09 17:25:11.377 [INF] RPCS: Listening on [::1]:18554
2024-10-09 17:25:11.377 [INF] BTCW: Attempting RPC client connection to 127.0.0.1:18556
2024-10-09 17:25:11.381 [INF] CHNS: Established connection to RPC server 127.0.0.1:18556
2024-10-09 17:25:11.909 [INF] WLLT: Opened wallet
2024-10-09 17:25:11.911 [INF] WLLT: RECOVERY MODE ENABLED -- rescanning for used addresses with recovery_window=250
2024-10-09 17:25:11.921 [INF] WLLT: Started rescan from block 683e86bd5c6d110d91b94b97137ba6bfe02dbbdb8e3dff722a669b5d69d77af6 (height 0) for 0 addresses
2024-10-09 17:25:11.922 [INF] WLLT: Catching up block hashes to height 0, this might take a while
2024-10-09 17:25:11.923 [INF] WLLT: Done catching up block hashes
2024-10-09 17:25:11.923 [INF] WLLT: Finished rescan for 0 addresses (synced to block 683e86bd5c6d110d91b94b97137ba6bfe02dbbdb8e3dff722a669b5d69d77af6, height 0)
2024-10-09 17:25:47.365 [ERR] CHNS: Websocket receive error from 127.0.0.1:18556: websocket: close 1006 unexpected EOF
2024-10-09 17:25:47.365 [INF] CHNS: Failed to connect to 127.0.0.1:18556: dial tcp 127.0.0.1:18556: connectex: No connection could be made because the target machine actively refused it.
2024-10-09 17:25:47.365 [INF] CHNS: Retrying connection to 127.0.0.1:18556 in 5s
2024-10-09 17:25:52.374 [INF] CHNS: Reestablished connection to RPC server 127.0.0.1:18556
2024-10-09 17:25:52.374 [INF] WLLT: RECOVERY MODE ENABLED -- rescanning for used addresses with recovery_window=250
2024-10-09 17:25:52.375 [WRN] CHNS: Received unexpected reply: {"hash":"683e86bd5c6d110d91b94b97137ba6bfe02dbbdb8e3dff722a669b5d69d77af6","height":0} (id 15)
2024-10-09 17:25:52.408 [INF] WLLT: Started rescan from block 683e86bd5c6d110d91b94b97137ba6bfe02dbbdb8e3dff722a669b5d69d77af6 (height 0) for 1 address
2024-10-09 17:25:52.409 [INF] WLLT: Catching up block hashes to height 0, this might take a while
2024-10-09 17:25:52.409 [INF] WLLT: Done catching up block hashes
2024-10-09 17:25:52.409 [INF] WLLT: Finished rescan for 1 address (synced to block 683e86bd5c6d110d91b94b97137ba6bfe02dbbdb8e3dff722a669b5d69d77af6, height 0)
2024-10-09 17:26:49.580 [INF] WLLT: The wallet has been temporarily unlocked
2024-10-09 17:31:48.974 [INF] WLLT: The wallet has been locked
2024-10-09 17:59:05.289 [INF] WLLT: The wallet has been temporarily unlocked

btcctl run

.\btcctl.exe --configfile=.\btcctl.conf --simnet generate 10
[
  "3de301af7fc0410ddf215cd97129010bffc7289a1391ec508e90cab9524eb75e",
  "128716ed3c7cb6810096eeed85c1d6669be0f1e50fc82a485f94a9967117ff7e",
  "6ea7bf1cae39db21c887c6927cb1a2b5788da4d0f8dca2e94c12540af5265f79",
  "186d8b9db574f9d444408d43647f09fb4d86cdae770e6c235a0580de15236acc",
  "627c4ae9099f757f7d8739eefae47cb7a05367c40e535fe4b1bf38a14ba8df56",
  "4e38579a22461db94dc48d38fe0b12a2ef93d60548b627b32cc52f806646d538",
  "388444f3539c2e8f9f68ddfb9b800911d0d369ca25fa05bfd6c292ee393cf6e9",
  "04c23e4bd3720d920298ab23e9dfb6a6152ea83efd13a9b94935acf1f1334109",
  "179d391a0b7f3e66a5d615182adce2d7e72322fe5425fcc42e2419e2e199c6e0",
  "749f366be8b2f6b829ae5af5dc79bbb783f3129514759171c4bc68ea540fcb82"
]

.\btcctl.exe --configfile=.\btcctl.conf --simnet getbalance
0

.\btcctl.exe --configfile=.\btcctl.conf --simnet getreceivedbyaddress SQW4z4BsNZKR42GP1752JqjEiG91PuFa3R
500

.\btcctl.exe --configfile=.\btcctl.conf --simnet --wallet sendtoaddress "sb1q5hfl9hwlkkqtldwfywuhkksev8ecc8gy5w650w" 44
-32603: insufficient funds available to construct transaction

The address has funds from mining, but it's unable to transfer them to another address.

[Roasbeef]

You need to mine 100 blocks before you can spend a coinbase output.