This is a windows error, it looks like emplode made an API call with an incorrect parameter value.

From winapi.h

//
// MessageId: E_INVALIDARG
//
// MessageText:
//
// One or more arguments are invalid
//
#define E_INVALIDARG _HRESULT_TYPEDEF_(0x80070057L)

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Unit serial number 47 (was 330 in the queue)...
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Remind me to change my signature to something more interesting someday