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Looks like there is not enough disk space for the window swap file.
Splunk is installed on E: hard drive which has 1.4TB free space. The C: drive only has 65GB free space.
Is this issue because the C: drive is not large enough? Is there a way to tell Splunk/Windows to use E: drive for the swap file?
Either drive is more than enough for a swap file. What action were you doing when you received this error? How much free memory do you have?