Which phone?
Which version of android?
Which carrier?
Which SMS app?
What is the exact wording of the error message?
Most likely the problem is that the file is too big for SMS.
If that is the case, you can send it by email, or maybe use a 3rd-party messaging service that uses internet data instead of SMS, or upload the file to Dropbox.com or GoogleDrive then message the URL of the file.