Knime error message

ERROR R Snippet (Local) Execute failed: Must specify non-null table spec and file reader settings for file table.

 This is caused by the R snippet returning a null table (The R variable being NULL)

Knime Tip: control + OK on a config dialog, executes the node.

KNIME memory

Add memory to KNIME.
http://tech.knime.org/faq#q4_2
Done from the knime.ini file for standalone.