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# TSSundialsSetLinearTolerance
Sets the tolerance used to solve the linear system by `TSSUNDIALS`.
## Synopsis
```
#include "petscts.h"
PetscErrorCode TSSundialsSetLinearTolerance(TS ts, PetscReal tol)
```
Logically Collective
## Input Parameters
- ***ts -*** the time-step context
- ***tol -*** the factor by which the tolerance on the nonlinear solver is
multiplied to get the tolerance on the linear solver, .05 by default.
## See Also
[](ch_ts), `TSSundialsGetIterations()`, `TSSundialsSetType()`, `TSSundialsSetMaxl()`,
`TSSundialsSetGramSchmidtType()`, `TSSundialsSetTolerance()`,
`TSSundialsGetIterations()`, `TSSundialsSetType()`,
`TSSundialsSetLinearTolerance()`, `TSSundialsSetTolerance()`, `TSSundialsGetPC()`,
`TSSetExactFinalTime()`
## Level
advanced
## Location
src/ts/impls/implicit/sundials/sundials.c
## Implementations
TSSundialsSetLinearTolerance_Sundials in src/ts/impls/implicit/sundials/sundials.c
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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ts/impls/implicit/sundials/sundials.c)
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