Keep getting an error as 'ASCII file unsupported' which terminates the code

When running a function from the efmtoool by ETH Zurich - to produce a print out of code - I am recieving the error printed below. The term 'stoich' it refers to is a sparse double - 72*95 matrix in size. How can i eliminate this error?

Warning: Saving sparse arrays to an ASCII file is unsupported.
	Variable 'stoich' not written to file. 
> In CalculateFluxModes>CalculateStoich (line 203)
  In CalculateFluxModes (line 109)
  In EFMTool_test (line 21) 
java call arguments:
	-kind stoichiometry -stoich tmp/stoich.txt -rev tmp/revs.txt -meta tmp/mnames.txt -reac tmp/rnames.txt -arithmetic double -zero 1e-10 -out matlab tmp/efms.mat -compression default -log console -level INFO -tmpdir /Users/b5019437/Documents/MATLAB/pHd/EFM Methods/efmtool/tmp -maxthreads -1 -normalize min -adjacency-method pattern-tree-minzero -rowordering MostZerosOrAbsLexMin

2020-11-23  15:14:45.560  main                     INFO     | logger initialized
2020-11-23  15:14:45.561  main                     INFO     | =====================================================
2020-11-23  15:14:45.561  main                     INFO     | efmtool version 4.7.1, 2009-12-04 18:30:05
2020-11-23  15:14:45.561  main                     INFO     | Copyright (c) 2009, Marco Terzer, Zurich, Switzerland
2020-11-23  15:14:45.561  main                     INFO     | This is free software, !!! NO WARRANTY !!!
2020-11-23  15:14:45.561  main                     INFO     | See LICENCE.txt for redistribution conditions
2020-11-23  15:14:45.561  main                     INFO     | =====================================================
java.lang.NegativeArraySizeException
	at ch.javasoft.metabolic.parse.StoichParser.parseStoich(StoichParser.java:226)
	at ch.javasoft.metabolic.parse.StoichParser.parse(StoichParser.java:112)
	at ch.javasoft.metabolic.parse.ConfiguredParser.parseStoichiometry(ConfiguredParser.java:405)
	at ch.javasoft.metabolic.parse.ConfiguredParser.parse(ConfiguredParser.java:219)
	at ch.javasoft.metabolic.parse.ConfiguredParser.parseConfig(ConfiguredParser.java:201)
	at ch.javasoft.metabolic.efm.main.CalculateFluxModes.start(CalculateFluxModes.java:217)
	at ch.javasoft.metabolic.efm.main.CalculateFluxModes.start(CalculateFluxModes.java:143)
	at ch.javasoft.metabolic.efm.main.CalculateFluxModes.matlab(CalculateFluxModes.java:109)
ch.javasoft.metabolic.efm.main.CalculateFluxModes with following arguments: -kind stoichiometry -stoich tmp/stoich.txt -rev tmp/revs.txt -meta tmp/mnames.txt -reac tmp/rnames.txt -arithmetic double -zero 1e-10 -out matlab tmp/efms.mat -compression default -log console -level INFO -tmpdir /Users/b5019437/Documents/MATLAB/pHd/EFM Methods/efmtool/tmp -maxthreads -1 -normalize min -adjacency-method pattern-tree-minzero -rowordering MostZerosOrAbsLexMin

>>

Answer 1

[Rik]

The solution is in the error message: "Saving sparse arrays to an ASCII file is unsupported."

Either use full to convert your sparse double to a normal double, or don't use an ASCII file.