wm.server.ns:makeNode error

When we restart the IS server on Windows, I met this error:
wm.server.ns:makeNode java.io.IOException: not enough disk space (this is translated from Chinese)
But I’ve checked the disk, there are 3G room left on C disk where IS installed.
And one of the packages are partically loaded, so we got this error:
com.wm.app.b2b.server.ServiceSetupException: com.wm.lang.flow.FlowException:
com.wm.lang.xml.WMDocumentException: [ISC.0042.9325] last tag lost (translated from Chinese).
And some of our adapter services were lost when open in developer. But the source code are still in packages folder.
So why is there the not enough room error since we still have 3G in C:.
And is this the reason for the partical loaded package and lost services? And now the package service are corrupt :frowning:
Thanks for your attention.