This variable is from the 2010 NHIS (NHIS variable name is BEP7D). I can find EMOPROBWK in the IHIS codebook but not as a variable in the on-line analysis system.
EMOPROBWK is indeed available in the online analysis system. At this time, the 2010 dataset erroneously categorizes the Emotional Help variables under the Child Strengths and Difficulties drop-down menu. The IHIS team is currently working to rectify this issue.
When analyzing data online, if you ever have problems locating variables in the drop-down menus, you can identify them on the IHIS website and then type them directly into the row, column, control, or selection filter spaces.
I hope this helps.