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RAVE logo R Analysis and Visualization of iEEG


Getting Help

Common problems are described below in the Troubleshooting section .

Clicking on the help icon in each RAVE menu ("?") opens a help page (also accessible from links below). Help is searchable e.g. to find help on outliers in RAVE search for outlier in openwetware.org/wiki/RAVE in Google.

Also examine the Tutorials.

Personalized support is provided via our Slack workspace rave-brain.slack.com. E-mail rave-support@listserv.bcm.edu for an invitation to the support channel.

Help Pages for Different RAVE GUI Modules

RAVE Toolbar

The RAVE toolbar contains input panels on the left ("Configure Analysis") and output panels on the right ("Results on Surface"). Click on the links above (e.g. "Power Explorer") for more information on different modules. RAVE toolbar and panels


Full Disks One problem that can lead to performance issues or difficult-to-diagnose symptoms is if your primary storage device is full or nearly full. This can generate errors that are not obviously due to low disk space, such as this one:

Warning in mccollect(jobs = jobs, wait = TRUE) :
 1 parallel job did not deliver a result
x Failed to retrieve the result of MulticoreFuture (<none>) from the forked worker

In the event of errors like this, the first step should be to check the amount of free disk space (on Mac, click on the icon for "Macintosh HD" and type Apple-I to show the amount of free disk space.) iEEG data is very large and can easily fill up even large file systems. During processing, RAVE creates large cache files to improve performance, but these cache files can fill disks. Cache files can be manually deleted from the cache directory. Check or set the cache directory with rave::rave_options(). A common location would be


This directory should be placed on a disk with fast read and write access, and does not need to be backed up. To free up space, it is OK to delete any cache files that may have accumulated. The cache directory can also be changed to a disk with more free space, such as a RAID.

Browser disconnected from server. Another common issue is that the RAVE GUI in the browser window appears dim or grayed out. This indicates that the browser has become disconnected from the RAVE server (e.g. if the computer has gone to sleep mode and then woken up). To reconnect to the RAVE server, try refreshing the browser window (right-click and select "reload" or highlight the URL the browser address bar and press enter). If this does not work, then follow the instructions for shutting down the RAVE server, then relaunch.