Im totally new to mining and i have no idea how to use xmr stak . so this is how my config looks like : * * pool_address - xmr-eu1.nanopool.org * wallet_address - 46LaSehNou1PTyj7GxiX5piYwzmPkP83ohPgSetdAkz3HMhBgSgbJWsGmC9EuYq2edAkhENjfppLPWKbXdpBKVKUGjHp34p * pool_password - * use_nicehash - n * use_tls - n * tls_fingerprint - * pool_weight - Pool weight is a number telling the miner how important the pool is. Miner will mine mostly at the pool * with the highest weight, unless the pool fails. Weight must be an integer larger than 0. * * We feature pools up to 1MH/s. For a more complete list see M5M400's pool list at www.moneropools.com */ "pool_list" : [ {"pool_address" : "de.minexmr.com", "wallet_address" : "46LaSehNou1PTyj7GxiX5piYwzmPkP83ohPgSetdAkz3HMhBgSgbJWsGmC9EuYq2edAkhENjfppLPWKbXdpBKVKUGjHp34p", "pool_password" : "", "use_nicehash" : false, "use_tls" : false, "tls_fingerprint" : "", "pool_weight" : 1 }, ],

/* * currency to mine * allowed values: 'monero' or 'aeon' */ "currency" : "monero",

/* * Network timeouts. * Because of the way this client is written it doesn't need to constantly talk (keep-alive) to the server to make * sure it is there. We detect a buggy / overloaded server by the call timeout. The default values will be ok for * nearly all cases. If they aren't the pool has most likely overload issues. Low call timeout values are preferable - * long timeouts mean that we waste hashes on potentially stale jobs. Connection report will tell you how long the * server usually takes to process our calls. * * call_timeout - How long should we wait for a response from the server before we assume it is dead and drop the connection. * retry_time - How long should we wait before another connection attempt. * Both values are in seconds. * giveup_limit - Limit how many times we try to reconnect to the pool. Zero means no limit. Note that stak miners * don't mine while the connection is lost, so your computer's power usage goes down to idle. */ "call_timeout" : 10, "retry_time" : 30, "giveup_limit" : 0,

/* * Output control. * Since most people are used to miners printing all the time, that's what we do by default too. This is suboptimal * really, since you cannot see errors under pages and pages of text and performance stats. Given that we have internal * performance monitors, there is very little reason to spew out pages of text instead of concise reports. * Press 'h' (hashrate), 'r' (results) or 'c' (connection) to print reports. * * verbose_level - 0 - Don't print anything. * 1 - Print intro, connection event, disconnect event * 2 - All of level 1, and new job (block) event if the difficulty is different from the last job * 3 - All of level 1, and new job (block) event in all cases, result submission event. * 4 - All of level 3, and automatic hashrate report printing * * print_motd - Display messages from your pool operator in the hashrate result. */ "verbose_level" : 3, "print_motd" : true,

/* * Automatic hashrate report * * h_print_time - How often, in seconds, should we print a hashrate report if verbose_level is set to 4. * This option has no effect if verbose_level is not 4. */ "h_print_time" : 60,

/* * Manual hardware AES override * * Some VMs don't report AES capability correctly. You can set this value to true to enforce hardware AES or * to false to force disable AES or null to let the miner decide if AES is used. * * WARNING: setting this to true on a CPU that doesn't support hardware AES will crash the miner. */ "aes_override" : null,

/* * LARGE PAGE SUPPORT * Large pages need a properly set up OS. It can be difficult if you are not used to systems administration, * but the performance results are worth the trouble - you will get around 20% boost. Slow memory mode is * meant as a backup, you won't get stellar results there. If you are running into trouble, especially * on Windows, please read the common issues in the README. * * By default we will try to allocate large pages. This means you need to "Run As Administrator" on Windows. * You need to edit your system's group policies to enable locking large pages. Here are the steps from MSDN * * 1. On the Start menu, click Run. In the Open box, type gpedit.msc. * 2. On the Local Group Policy Editor console, expand Computer Configuration, and then expand Windows Settings. * 3. Expand Security Settings, and then expand Local Policies. * 4. Select the User Rights Assignment folder. * 5. The policies will be displayed in the details pane. * 6. In the pane, double-click Lock pages in memory. * 7. In the Local Security Setting – Lock pages in memory dialog box, click Add User or Group. * 8. In the Select Users, Service Accounts, or Groups dialog box, add an account that you will run the miner on * 9. Reboot for change to take effect. * * Windows also tends to fragment memory a lot. If you are running on a system with 4-8GB of RAM you might need * to switch off all the auto-start applications and reboot to have a large enough chunk of contiguous memory. * * On Linux you will need to configure large page support "sudo sysctl -w vm.nr_hugepages=128" and increase your * ulimit -l. To do do this you need to add following lines to /etc/security/limits.conf - "* soft memlock 262144" * and "* hard memlock 262144". You can also do it Windows-style and simply run-as-root, but this is NOT * recommended for security reasons. * * Memory locking means that the kernel can't swap out the page to disk - something that is unlikely to happen on a * command line system that isn't starved of memory. I haven't observed any difference on a CLI Linux system between * locked and unlocked memory. If that is your setup see option "no_mlck". */

/* * use_slow_memory defines our behaviour with regards to large pages. There are three possible options here: * always - Don't even try to use large pages. Always use slow memory. * warn - We will try to use large pages, but fall back to slow memory if that fails. * no_mlck - This option is only relevant on Linux, where we can use large pages without locking memory. * It will never use slow memory, but it won't attempt to mlock * never - If we fail to allocate large pages we will print an error and exit. */ "use_slow_memory" : "warn",

/* * TLS Settings * If you need real security, make sure tls_secure_algo is enabled (otherwise MITM attack can downgrade encryption * to trivially breakable stuff like DES and MD5), and verify the server's fingerprint through a trusted channel. * * tls_secure_algo - Use only secure algorithms. This will make us quit with an error if we can't negotiate a secure algo. */ "tls_secure_algo" : true,

/* * Daemon mode * * If you are running the process in the background and you don't need the keyboard reports, set this to true. * This should solve the hashrate problems on some emulated terminals. */ "daemon_mode" : false,

/* * Buffered output control. * When running the miner through a pipe, standard output is buffered. This means that the pipe won't read * each output line immediately. This can cause delays when running in background. * Set this option to true to flush stdout after each line, so it can be read immediately. */ "flush_stdout" : false,

/* * Output file * * output_file - This option will log all output to a file. * */ "output_file" : "",

/* * Built-in web server * I like checking my hashrate on my phone. Don't you? * Keep in mind that you will need to set up port forwarding on your router if you want to access it from * outside of your home network. Ports lower than 1024 on Linux systems will require root. * * httpd_port - Port we should listen on. Default, 0, will switch off the server. */ "httpd_port" : 0,

/* * HTTP Authentication * * This allows you to set a password to keep people on the Internet from snooping on your hashrate. * Keep in mind that this is based on HTTP Digest, which is based on MD5. To a determined attacker * who is able to read your traffic it is as easy to break a bog door latch. * * http_login - Login. Empty login disables authentication. * http_pass - Password. */ "http_login" : "", "http_pass" : "",

/* * prefer_ipv4 - IPv6 preference. If the host is available on both IPv4 and IPv6 net, which one should be choose? * This setting will only be needed in 2020's. No need to worry about it now. */ "prefer_ipv4" : true,

"cpu_threads_conf" : [ { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 0 }, { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 2 }, { "low_power_mode" : false, "no_prefetch" : true, "affine_to_cpu" : 4 },


and this is the error that comes after i use xmr stak : [2018-01-02 13:55:28] : Start mining: MONERO WARNING: NVIDIA Insufficient driver! [2018-01-02 13:55:28] : WARNING: backend NVIDIA disabled. [2018-01-02 13:55:28] : WARNING: No AMD OpenCL platform found. Possible driver issues or wrong vendor driver. [2018-01-02 13:55:28] : WARNING: backend AMD disabled. [2018-01-02 13:55:28] : Starting 1x thread, affinity: 0. [2018-01-02 13:55:28] : hwloc: memory pinned [2018-01-02 13:55:28] : Starting 1x thread, affinity: 2. [2018-01-02 13:55:28] : MEMORY ALLOC FAILED: VirtualAlloc failed. [2018-01-02 13:55:28] : hwloc: memory pinned [2018-01-02 13:55:28] : Starting 1x thread, affinity: 4. [2018-01-02 13:55:28] : MEMORY ALLOC FAILED: VirtualAlloc failed. [2018-01-02 13:55:28] : hwloc: memory pinned [2018-01-02 13:55:28] : Fast-connecting to de.minexmr.com pool ... [2018-01-02 13:55:28] : SOCKET ERROR - [de.minexmr.com] CONNECT error: Pool port number not specified, please use format :. [2018-01-02 13:55:28] : MEMORY ALLOC FAILED: VirtualAlloc failed.

What should i do ?

  • You didnt specify the port to connect to. Read the error messages. It tells you whats wrong. Commented Jan 2, 2018 at 13:04
  • I just tried to connect to nanopool and also am receiving an error from a configuration I know to be valid / have worked before. Outside of any mistake you may have made, nanopool appears to be having problems as well atm.
    – user4066
    Commented Jan 2, 2018 at 19:39

2 Answers 2


You need to specify a port to connect to on the pool

"pool_address" : "de.minexmr.com"

You need to add something like :10001 to the end of your address. Check with the pools website to know which port to connect to


It may be a little easier to test on my smaller pool.
Here is how the config file for your CPU miner would look using xmr-stak:

    "pool_address" : "mon.gulfcoastmining.com:3333",
    "wallet_address" : "46LaSehNou1PTyj7GxiX5piYwzmPkP83ohPgSetdAkz3HMhBgSgbJWsGmC9EuYq2edAkhENjfppLPWKbXdpBKVKUGjHp34p",
    "pool_password" : "MyCPUminer"

Once you get that all squared away you should easily be able to convert it to nanopool with correct address and port.

  • Well yeah I tried that too after I read all of your comments . Commented Jan 2, 2018 at 17:25
  • But minexmr.com/#getting_started even after using the ports seen in this link the same error came up again. Commented Jan 2, 2018 at 17:26
  • I also tried the gulfcoastmining address and this came up : JSON config parse error(offset 9299): Invalid value. Commented Jan 2, 2018 at 17:45
  • and also shoul i just delete the whole text and just leave the text above and the thread one ? or keep the text and replace the details? Commented Jan 2, 2018 at 17:50
  • Yes, start with a new file (just rename the original). I've corrected the above to work for you. On my pool you can also look at the config utility to help.
    – user4066
    Commented Jan 2, 2018 at 19:16

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