From the error, it looks like you have assigned 700MB of memory to the eazyBI child process. The default (leaving the configuration field empty) is 1GB.
In larger instances, this is not enough. Increasing the heap memory to 2GB is absolutely necessary, but if your server allows it, you should increase the eazyBI child process JVM heap memory to 4GB (-Xmx4g).
If the above suggestion does not help, could you please also share the report definition for the report that is giving the error (https://docs.eazybi.com/display/EAZYBI/Create+reports#Createreports-Exportandimportreportdefinitions)?
Kind regards,
Roberts // eazyBI support