When I was doing a blast search of a nucleotide sequence I got a message "Message ID#30 Error: Subject string not found in the CGI context " How can we make the sequence in CGI context? Any comments..
It sounds like you are trying to perform a BLAST search using the NCBI BLAST service, and you are encountering an error message that says "Subject string not found in the CGI context". This error can occur for a variety of reasons, but it typically indicates that there is a problem with the input sequence that you are trying to search against.
To correct this error, you will need to ensure that the input sequence is in the correct format and meets the requirements for the BLAST search. Here are some things you can try:
Check the input sequence: Make sure that the input sequence is in the correct format (e.g., FASTA format). You can also check the sequence to ensure that it is complete and contains no errors.
Use the correct database: Make sure that you are using the correct database for your search. For example, if you are searching a protein sequence, you should use the protein database (e.g., nr), rather than the nucleotide database (e.g., nt).
Check the parameters: Make sure that you are using the correct parameters for your search. For example, if you are searching a protein sequence, you should select the "blastp" algorithm, rather than the "blastn" algorithm.
If you have checked the input sequence, database, and parameters, and you are still encountering the error message, you may need to contact the NCBI BLAST help desk for further assistance. They should be able to help you troubleshoot the problem and suggest a solution.