Why does doIMRMC in the R package NOT work

The two most common reasons that doIMRMC doesn't work are

• Java is not installed or up to date, and
• there are spaces in the full directory path.

iMRMC R package versions 1.2.3 and earlier call the iMRMC java application to crunch the numbers. An error described above is reported as a warning about running command "java" and shows where the java application in your R library exists on your local computer.

Fix: Java is not installed or up to date

Check the java version by typing java -version into the command terminal. The version number should be at least 1.7 or higher, if you don't have the latest version of Java, update it to run doIMRMC.

Fix: There are spaces in the full directory path

In order for R to call the java application when executing doIMRMC, the full path must not have any spaces. Here is a link to instructions for changing the Default Library in Rstudio.