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>> BCL file

BCL file format description

Many people share .bcl files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .bcl file can be edited, converted or printed with. On this page, we try to provide assistance for handling .bcl files.

1 filename extension(s) found in our database.

.bcl - Illumina CASAVA Base Call

BCL file is an Illumina CASAVA Base Call. Illumina CASAVA (Consensus Assessment of Sequence And VAriation) is a complete an analysis package for processing sequence from the Genome Analyzer. Illumina sequencing instruments generate *.bcl files as primary sequencing output.

.bcl file format description:
BCL format
Illumina CASAVA
Data files
- / -
Illumina CASAVA Base Call related links:
Illumina CASAVA Base Call related extensions:
Vim Swap Data
Running Time Logger Profile
FacetWin File Set Description
QRT RayTracer Image
Gerber Keep Out Layer

Naturally, other applications may also use the .bcl file extension. Even harmful programs can create .bcl files. Be especially cautious with .bcl files coming from an unknown source!

Can't open a .bcl file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .bcl file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

vcl, bci, hcl, fcl, cbl, bvl, blc, bfl, bcp, bck, ncl, gcl, cl, bxl, bsl

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Belarc Advisor Report
GNU Common Lisp Source Code
Accelerated Designs Binary PCB Library
PTC Creo Bundle File
Lisp Source Code
HP OpenVMS Backup File

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