demon said:
another problem i found, wen we adding a custom filed called keywords, and we convert to post tags, all tags joining as a single tags
example
keywords = tag1,tag2
after convert
we getting like tag=tag1-tag2
not like tag1 , tag2
how to fix this
and how to make all done automatically
That is the correct behaviour.
If you want to get separate tags, you will have to add a separate meta value with the same meta key for each one.
You really should use actual tags instead of custom fields from the start.
Try the development version (2.0.1-alpha). It should split tags as expected.