Note that MMEX has not withdrawn its Definitive 14C filing, nor has MMEX made progress (apparently) with FINRA on the notice of corporate action - there is nothing in the FINRA Daily List.
According to MMEX, a mailing to shareholders of record went out Sept. 26. The following, from page 4 of the Def. 14C, and the content of Annex A in that document are relevant:
October 19, 2018 was 24 calendar days from the shareholder notice. Something is amiss with skeevy 'ol Mad J., as usual.
Assuming MMEX did not falsify its filings, or PR, one must assume FINRA has not approved the corporate action. There are errors in the pre-14C, and Def. 14C narrative, so perhaps those, and other undisclosed errors in filing are at the root of the problem.
No matter what, MMEX shareholders are screwed. The normal course of action following FINRA's failure to approve a corporate action, like a split (either forward, or reverse) lands the issue on DTC's Chill List.