Dear Till,
I hope you are well and that I am not bothering you too much. I am working on DNA metabarcoding of the stomach contents of Atlantic bluefin tuna by amplifying partial fragments of the COI and 18S gene regions. I am using APSCALE_GUI on Windows 11 OS for data processing, and that is why I am contacting you. To put it in a nutshell: COI data processing is going smoothly, but I have a problem with taxonomic assignment of my 18S data, i.e., with creating a local database (Local BLAST - Custom NCBI) and with the usage of NCBI BLAST. When I try to do a taxanomic assignment via NCBI BLAST, I get this error: AttributeError: 'XlsxWriter' object has no attribute 'save'. Did you mean: '_save'?, and I also get an error message from Excel saying that the file cannot be opened because the file extension is not valid. If I use Local BLAST - Custom NCBI, on the other hand, everything seems to work fine until I have to filter the blast results, where this error occurs: ValueError: Length mismatch: Expected axis has 20 elements, new values have 11 elements. In the attachment, you will find a screenshot of the problem that occurs. I have noticed that there are options in the software for Silva and PR2 databases, but I have not found instructions on how to create these local databases. Can you please help me solve this problem or write me an instructions on how to create local Silva database, that would be really helpful.
Thank you very much and best regards,
Luka



Dear Till,
I hope you are well and that I am not bothering you too much. I am working on DNA metabarcoding of the stomach contents of Atlantic bluefin tuna by amplifying partial fragments of the COI and 18S gene regions. I am using APSCALE_GUI on Windows 11 OS for data processing, and that is why I am contacting you. To put it in a nutshell: COI data processing is going smoothly, but I have a problem with taxonomic assignment of my 18S data, i.e., with creating a local database (Local BLAST - Custom NCBI) and with the usage of NCBI BLAST. When I try to do a taxanomic assignment via NCBI BLAST, I get this error: AttributeError: 'XlsxWriter' object has no attribute 'save'. Did you mean: '_save'?, and I also get an error message from Excel saying that the file cannot be opened because the file extension is not valid. If I use Local BLAST - Custom NCBI, on the other hand, everything seems to work fine until I have to filter the blast results, where this error occurs: ValueError: Length mismatch: Expected axis has 20 elements, new values have 11 elements. In the attachment, you will find a screenshot of the problem that occurs. I have noticed that there are options in the software for Silva and PR2 databases, but I have not found instructions on how to create these local databases. Can you please help me solve this problem or write me an instructions on how to create local Silva database, that would be really helpful.
Thank you very much and best regards,
Luka


