What are some of the KJV errors?
Many have been pointed out in several different long, drawn out threads in the recent past.... do a search.
The problem is that when an error, or misuse of a word is pointed out, the KJVO crowd either ignores it, or brushes it off as an insignificant typo or some such.
Then they turn right around and condemn another translation for the same type of "error"....
The point is, there is no absolutely error or discrepancy-free translation of the word. There are several that are very good, like the KJV, NASB, NRSV, etc, that are more "word for word" translations. The KJV is the most difficult to understand for 21st century English speaking folks. It doesn't mean it's bad, just difficult to understand.
Your insistence on the "complete, pure, inerrant" word of God is chasing after the wind.... unless you can read and converse in Koine greek, and have copies of the oldest manuscripts, there is always a chance that a word has been substituted for another word for clarification, or to modernize the translation.
This is why it is good to compare translations... INCLUDING the KJV, if you have problems understanding a passage.
The newer translations were all done the same way that the KJV was done, by MEN, who (I assume) prayerfully studied the best known texts at that time, and translated them in the common vernacular of their day, with the intent of giving the world their best effort at an accurate translation of the words of God.
That is what we have as the words of God.... translated by men, guided by the Spirit...