Your code does not 'skip' anything, nor is there any concept of anything 'running until the end'. Can you state the problem more clearly? Feel free to add sample data...

Please provide sample DDL, INSERT statements and desired results (based on the sample data provided) if you would like people to provide a working solution.

I rarely use absolutes, but I feel comfortable using one here.

Given the generic nature of that error message, no one here is going to be able to solve this for...

Jeez, 13150 points and you still haven't learned how to present your code in a code block.

All you need to do is click on the Insert/edit code sample button...

Great, my pleasure and thanks for posting back. So many people just disappear without trace once they have a solution.

With thanks to Itzik Ben-Gan for the inline tally table, how about this?

DECLARE @Day TINYINT = 4;
DECLARE @NumberOfPayments INT = 20;
DECLARE @StartDate DATE = DATEADD(DAY, @Day -...

Every month since when? Until when?

Please read this article.

It's a lot easier to view the run logs from the All Executions report than by querying SSISDB directly.

"I need a way to calculate, the date of every month, for whatever combination that they send in here."

Not sure what this means. Define 'every'. Something like this?