Revocation or amendment for just cause

Revocation or amendment for just cause.--Grant of probate or letters of administration may be revoked or amended for just cause. Explanation.--Just cause is-- 1st, that the proceedings to obtain the grant were defective in substance; 2nd that the grant was obtained fraudulently or by concealing from the Court something material to the case; 3rd, that the grant was obtained by means of untrue allegation of a fact essential in point of law to justify the grant, such allegation was made in ignorance or inadvertently; 4th, that the grant has become useless and inoperative through circumstances; 5th, that the person to whom the grant has been made has wilfully and without reasonable cause omitted to exhibit an inventory or account in accordance with the provisions of Chapter VII, or has exhibited under that Chapter an inventory or account which is untrue in a material respect.