DSXchange

I know that when copying one dataset to another location with ds extension we use orchadmin command. But when i tried to copy a sequentila file to another text file with an extension txt IT ONLY COPIES THE DESCRIPTOR FILE. i dont know how this descriptor came from. Do sequential files also produce descriptor files. How can i solve this. zshould i use orchadmin for copying text files tooo.

No clue what you mean by the 'DESCRIPTOR FILE', sequence files shouldn't have any such thing. While I suppose you may be able to use orchadmin to copy text files, I don't see why you would need to. Just use your normal O/S level commands for text files.

I know that when copying one dataset to another location with ds extension

Extensions don't matter! They are more like a standard we should follow. Your datasets will work fine even if you don't give an extension of ".ds" or for that matter give an extension ".mp3"

i tried to copy a sequentila file to another text file with an extension txt

What command have you used to copy?