I've been trying to use the runenergyplus shell script but keep getting an error.

So I have an IDF file and a weather file and do:

runenergyplus idffile weather_file

which runs all the calculations but then I get this:

Writing tabular output file results using HTML format.
Computing Life Cycle Costs and Reporting
Writing final SQL reports
EnergyPlus Run Time=00hr 00min 15.69sec
 ReadVarsESO program starting.
 Requested ESO file=eplusout.eso
 does not exist.  ReadVarsESO program terminated.
 ReadVarsESO program terminated.
 ReadVarsESO program starting.
 Requested ESO file=eplusout.mtr
 does not exist.  ReadVarsESO program terminated.
 ReadVarsESO program terminated.
  Started HVAC Diagram
  Complete

Isn't running runenergyplus supposed to create the .eso file that is missing? In the output folder I'm still getting the following:

• .audit
• .bnd
• .eio
• .err
• .expidf
• .mdd
• .mtd
• .rdd
• .rvaudit
• .shd
• .sql
• .svg
• SQLite.err
• .html
• .csv

Edit:

Specifying Output:Variable fixed half the issue, thanks.

 ReadVarsESO program starting.
 ReadVars Run Time=00hr 00min  0.07sec
 ReadVarsESO program completed successfully.
 ReadVarsESO program starting.
 Requested ESO file=eplusout.mtr
 does not exist.  ReadVarsESO program terminated.
 ReadVarsESO program terminated.
  Started HVAC Diagram
  Complete