When I initially tried importing a 45 MB Excel file, I got an error related to "java heap space". Then after some limited research, I closed down my SQL Developer app, added the following new line to my "sqldeveloper.conf" file in my '\sqldeveloper-20.4.1.407.0006-x64\sqldeveloper\sqldeveloper\bin' subfolder: "AddVMOption -Xmx1024M", and tried again but now I get this error:
"File C:\Users\tpidding\Desktop\EEM_Monitoring\TABLE_EXPORT_DATA.xlsx cannot be opened due to the following error: GC overhead limit exceeded."