Skip to content

Common Errors

Cannot connect to your MySQL server

**Error in .local(drv, \...) :** **Failed to connect to database: Error:
Can\'t initialize character set unknown (path: compiled\_in)** :

Calls: dbConnect -> dbConnect -> .local -> .Call
Execution halted
[Tue Mar 10 19:40:15 2020]
Error in rule download_dataset:
    jobid: 531
    output: data/raw/p60/locations_raw.csv

CalledProcessError in line 20 of /home/ubuntu/rapids/rules/preprocessing.snakefile:
Command 'set -euo pipefail;  Rscript --vanilla /home/ubuntu/rapids/.snakemake/scripts/tmp_2jnvqs7.download_dataset.R' returned non-zero exit status 1.
File "/home/ubuntu/rapids/rules/preprocessing.snakefile", line 20, in __rule_download_dataset
File "/home/ubuntu/anaconda3/envs/moshi-env/lib/python3.7/concurrent/futures/", line 57, in run
Shutting down, this might take some time.
Exiting because a job execution failed. Look above for error message

Please make sure the DATABASE_GROUP in config.yaml matches your DB credentials group in .env.

Cannot start mysql in linux via brew services start mysql


Cannot start mysql in linux via brew services start mysql


Use mysql.server start

Every time I run force the download_dataset rule all rules are executed


When running snakemake -j1 -R pull_phone_data or ./rapids -j1 -R pull_phone_data all the rules and files are re-computed


This is expected behavior. The advantage of using snakemake under the hood is that every time a file containing data is modified every rule that depends on that file will be re-executed to update their results. In this case, since download_dataset updates all the raw data, and you are forcing the rule with the flag -R every single rule that depends on those raw files will be executed.

Error Table XXX doesn't exist while running the download_phone_data or download_fitbit_data rule.

Error in .local(conn, statement, ...) : 
  could not run statement: Table 'db_name.table_name' doesn't exist
Calls: colnames ... .local -> dbSendQuery -> dbSendQuery -> .local -> .Call
Execution halted

Please make sure the sensors listed in [PHONE_VALID_SENSED_BINS][PHONE_SENSORS] and the [CONTAINER] of each sensor you activated in config.yaml match your database tables or files.

How do I install RAPIDS on Ubuntu 16.04

  1. Install dependencies (Homebrew - if not installed):

    • sudo apt-get install libmariadb-client-lgpl-dev libxml2-dev libssl-dev
    • Install brew for linux and add the following line to ~/.bashrc: export PATH=$HOME/.linuxbrew/bin:$PATH
    • source ~/.bashrc
  2. Install MySQL

    • brew install mysql
    • brew services start mysql
  3. Install R, pandoc and rmarkdown:

    • brew install r
    • brew install gcc@6 (needed due to this bug)
    • HOMEBREW_CC=gcc-6 brew install pandoc
  4. Install miniconda using these instructions

  5. Clone our repo:

    • git clone
  6. Create a python virtual environment:

    • cd rapids
    • conda env create -f environment.yml -n MY_ENV_NAME
    • conda activate MY_ENV_NAME
  7. Install R packages and virtual environment:

    • snakemake renv_install
    • snakemake renv_init
    • snakemake renv_restore

    This step could take several minutes to complete. Please be patient and let it run until completion.

mysql.h cannot be found

--------------------------[ ERROR MESSAGE ]----------------------------
<stdin>:1:10: fatal error: mysql.h: No such file or directory
compilation terminated.
ERROR: configuration failed for package 'RMySQL'
sudo apt install libmariadbclient-dev

No package libcurl found


libcurl cannot be found


Install libcurl

sudo apt install libcurl4-openssl-dev

Configuration failed because openssl was not found.


openssl cannot be found


Install openssl

sudo apt install libssl-dev

Configuration failed because libxml-2.0 was not found


libxml-2.0 cannot be found


Install libxml-2.0

sudo apt install libxml2-dev

SSL connection error when running RAPIDS


You are getting the following error message when running RAPIDS:

Error: Failed to connect: SSL connection error: error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol.


This is a bug in Ubuntu 20.04 when trying to connect to an old MySQL server with MySQL client 8.0. You should get the same error message if you try to connect from the command line. There you can add the option --ssl-mode=DISABLED but we can't do this from the R connector.

If you can't update your server, the quickest solution would be to import your database to another server or to a local environment. Alternatively, you could replace mysql-client and libmysqlclient-dev with mariadb-client and libmariadbclient-dev and reinstall renv. More info about this issue here

DB_TABLES key not found


If you get the following error KeyError in line 43 of preprocessing.smk: 'PHONE_SENSORS', it means that the indentation of the key [PHONE_SENSORS] is not matching the other child elements of PHONE_VALID_SENSED_BINS


You need to add or remove any leading whitespaces as needed on that line.

    COMPUTE: False # This flag is automatically ignored (set to True) if you are extracting PHONE_VALID_SENSED_DAYS or screen or Barnett's location features
    BIN_SIZE: &bin_size 5 # (in minutes)

Error while updating your conda environment in Ubuntu


You get the following error:

CondaMultiError: CondaVerificationError: The package for tk located at /home/ubuntu/miniconda2/pkgs/tk-8.6.9-hed695b0_1003
    appears to be corrupted. The path 'include/mysqlStubs.h'
    specified in the package manifest cannot be found.
ClobberError: This transaction has incompatible packages due to a shared path.
    packages: conda-forge/linux-64::llvm-openmp-10.0.0-hc9558a2_0, anaconda/linux-64::intel-openmp-2019.4-243
    path: 'lib/'


Reinstall conda

Embedded nul in string


You get the following error when downloading sensor data:

Error in result_fetch(res@ptr, n = n) : 
  embedded nul in string:


This problem is due to the way RMariaDB handles a mismatch between data types in R and MySQL (see this issue). Since it seems this problem won’t be handled by RMariaDB, you have two options:

  1. Remove the the null character from the conflictive table cell(s). You can adapt the following query on a MySQL server 8.0 or older
    update YOUR_TABLE set YOUR_COLUMN = regexp_replace(YOUR_COLUMN, '\0', '');
  2. If it’s not feasible to modify your data you can try swapping RMariaDB with RMySQL. Just have in mind you might have problems connecting to modern MySQL servers running in Linux:
    • Add RMySQL to the renv environment by running the following command in a terminal open on RAPIDS root folder
      R -e 'renv::install("RMySQL")'
    • Go to src/data/streams/pull_phone_data.R or src/data/streams/pull_fitbit_data.R and replace library(RMariaDB) with library(RMySQL)
    • In the same file(s) replace dbEngine <- dbConnect(MariaDB(), default.file = "./.env", group = group) with dbEngine <- dbConnect(MySQL(), default.file = "./.env", group = group)

There is no package called RMariaDB


You get the following error when executing RAPIDS:

Error in library(RMariaDB) : there is no package called 'RMariaDB'
Execution halted


In RAPIDS v0.1.0 we replaced RMySQL R package with RMariaDB, this error means your R virtual environment is out of date, to update it run snakemake -j1 renv_restore

Unrecognized output timezone “America/New_York”


When running RAPIDS with R 4.0.3 on MacOS on M1, lubridate may throw an error associated with the timezone.

Error in C_force_tz(time, tz = tzone, roll):
   CCTZ: Unrecognized output timezone: "America/New_York"
Calls: get_timestamp_filter ... .parse_date_time -> .strptime -> force_tz -> C_force_tz


This is because R timezone library is not set. Please add Sys.setenv(“TZDIR” = file.path(R.home(), “share”, “zoneinfo”)) to the file active.R in renv folder to set the timezone library. For further details on how to test if TZDIR is properly set, please refer to

Unimplemented MAX_NO_FIELD_TYPES


You get the following error when downloading Fitbit data:

Error: Unimplemented MAX_NO_FIELD_TYPES
Execution halted


At the moment RMariaDB cannot handle MySQL columns of JSON type. Change the type of your Fitbit data column to longtext (note that the content will not change and will still be a JSON object just interpreted as a string).

Running RAPIDS on Apple Silicon M1 Mac


You get the following error when installing pandoc or running rapids:

MoSHI/rapids/renv/staging/1/00LOCK-KernSmooth/00new/KernSmooth/libs/ mach-0, but wrong architecture


As of Feb 2020 in M1 macs, R needs to be installed via brew under Rosetta (x86 arch) due to some incompatibility with selected R libraries. To do this, run your terminal via Rosetta, then proceed with the usual brew installation command. x86 homebrew should be installed in /usr/local/bin/brew, you can check which brew you are using by typing which brew. Then use x86 homebrew to install R and restore RAPIDS packages (renv_restore).