The BCCI is keen on playing two Tests, five ODIs and two Twenty20 Internationals during the series beginning November, while Cricket South Africa had announced the schedule with three Tests, seven ODIs and two T20Is.
"We have not taken any final call on the tour as yet, hopefully we will send an alternative itinerary over to CSA after tomorrow's meeting," BCCI's acting President Dalmiya said.
The Working Committee is also likely to discuss the findings of a Disciplinary Committee comprising Jyotiraditya Scindia and Arun Jaitley, who were appointed to investigate charges of financial bunglings against Modi.
An exhaustive report of about 500 pages had been earlier submitted but it is unlikely that interim president Dalmiya would take a decision on Modi in tomorrow's meeting.
There is also speculation that the two-member internal probe panel, comprising former judges T Jayaram Chouta and R Balasubramanian, has also submitted its report on the IPL spot-fixing scandal.
But both Dalmiya and BCCI Secretary Sanjay Patel have denied receiving the report.
"We have not received any report... I've absolutely no idea about it," Dalmiya told PTI.
