Because of the business requirements, I will have to visit the Schengen countries on a frequent basis for short time spans. The main reason of visit is travel and most of my trips will be to Germany and France, but this can change from visit to visit.
As per what I can see on the VFS Germany website for India, they only give a national visa to the following categories -
Work Permit, Student, German Classes, Family Reunion, Au Pair, Specialty Cook, Medical Treatment, Guest Scientist and Visiting Scholars.
I need to visit my clients and won't have a work permit. I have got Schengen visas multiple times previously, but for tourism. From which country do I apply for such a visa which will be valid for at least 2-3 years? Will there be a problem in case a year or so down the line I enter a country for business, for example Latvia, on this visa?