# Troubleshooting

The software is provided “AS IS” so for the troubleshooting you are mostly on your own. We don’t provide any support of any kind for the software itself. Nevertheless, if you need help for your label experiment design and/or realization, you can contact our platform MetaToul (cf. Consulting and more)

Anyway, you can try to solve some current problems by yourself or with a local help.

If you have a problem during installation, you can ask for help from your local computer desk.

If you have a problem with FTBL editing, you can read the documentation from 13CFlux and/or interpret error messages generated during FTBL parsing.

If you have some difficulties in choosing free fluxes, define all not constrained fluxes as dependent (put a letter `D` in the column `FCD` of the FTBL sections `FLUXES/NET` and `FLUXES/XCH`) and see an error message that will suggest candidates for free fluxes.

If your resulting fluxes are badly defined (statistically or structurally), i.e. they have big confidence intervals or the Jacobian is rank deficient, you can try to play with input labeling (cf. IsoDesign software at http://metatoul.insa-toulouse.fr/metasys/software/isodes/) or try to collect some additional data on metabolites not yet measured. To have some insights on what part of the network is already well defined and which one still needs additional measurements, you can try to run `influx_si` with an option `--ln` (as least norm) (in addition to `--noopt` option) and examine standard deviation of the fluxes/concentrations in the resulting KVH file.

If you think to discover a bug in `influx_si` you can report it to the author by email `sokol [at] insa-toulouse [dot] fr`. At this moment, please be sure to use the latest available release as the bug may be already corrected or not be actual any more. Note also that we can’t guarantee that any particular bug can be fixed in any particular release or can be fixed at all. It is possible, that we ask you to send us an ftbl file on which an error occur. It will be done only for purposes of bug reproducing and its identification. The received ftbl file will not be transmitted to any third party.

Once again, if you could not resolve your problem by your own, see the next section Consulting and more.