Are you getting this error in Surpac? 

at.java.awt.AWTEventMulitcaster.focusLost(AWTEventMulticaster.java:229)

If so, you need to adjust the Java heap size setting. You can do that by clicking on Customise>Default Preferences>System Options>Java Virtual Machine-Adjust the Java heap size to a bigger number.

In GEOVIA Surpac 2023, you now have options to adjust the Java heap size to 2048 and 4096

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