Extract annotation content (species and features):

Hello,
I am using MEGAN Community Edition (version 6.23.2, built 9 May 2022) on Linux system. Loading rma file into these software used to be well. But now it keeps showing:
/gpfs/share/home/2101111992/megan/tools/rma2info -i AA4.rma -c2c Taxonomy -r2c Taxonomy -n true --paths true --ranks true --listMore true -v > AA4_Taxonomy.txt
RMA2Info - Analyses an RMA file
Options:
Input and Output
–in: AA4.rma
–out: stdout
Commands
–list: false
–listMore: true
–class2count: Taxonomy
–read2class: Taxonomy
–names: true
–paths: true
–ranks: true
–majorRanksOnly: false
–bacteriaOnly: false
–virusOnly: false
–ignoreUnassigned: true
–sum: false
Other:
–verbose: true
Version MEGAN Community Edition (version 6.23.2, built 9 May 2022)
Author(s) Daniel H. Huson
Copyright © 2022 Daniel H. Huson. This program comes with ABSOLUTELY NO WARRANTY.
Caught:
java.io.IOException: Incorrect file type: UNKNOWN_FILE
at megan/megan.tools.RMA2Info.run(RMA2Info.java:116)
at megan/megan.tools.RMA2Info.main(RMA2Info.java:58)
How to solve this error?

Are you sure that

AA4.rma

is indeed an RMA file. The error suggests that it isn’t. How did you compute it?