### Error when trying to change Dark Energy equation of state

Posted:

**May 19 2019**Hello,

Into params.ini file of CAMB-1.0.4, I have modified the parameter

But at the execution, when generating matter power spectrum, I get the following error :

About ", there is no problem,

But this doesn't seem to be the same thing for

Anyone could see what's wrong ? Is there a way to make change this parameter to generate matter power spectrum ?

Regards, Fabien Dournac

Into params.ini file of CAMB-1.0.4, I have modified the parameter

**w**initially set to**w=-1**. I tried by setting :**w = -0.96**or**w = -1.04**But at the execution, when generating matter power spectrum, I get the following error :

Code: Select all

```
ERROR STOP Fluid dark energy model does not allow w crossing -1
Error termination. Backtrace:
#0 0x104cc8579
#1 0x104cc9235
#2 0x104cca196
#3 0x104c05130
#4 0x104beac52
#5 0x104c543eb
#6 0x104c5851e
#7 0x104c58e8b
#8 0x104c8357f
```

**wa**parameter, I have already compiled CAMB with "Code: Select all

`make EQUATIONS=equations_ppf`

**wa**can be varying.But this doesn't seem to be the same thing for

**w**(actually named**w0**) since this error above.Anyone could see what's wrong ? Is there a way to make change this parameter to generate matter power spectrum ?

Regards, Fabien Dournac