Thanks Barry. I will update my petsc. By the way, I simply replaced the functions PetscFormatConvert() and PetscVFPrintfDefault() with those in petsc-3.6 and it works for me. Best, Rongliang On 04/17/2018 05:53 AM, Smith, Barry F. wrote:

Rongliang,

I have prepared a fix for this in the branch barry/bugfix-petscformatconvert which comes from the master branch of PETSc.

Unfortunately it requires many changes so cannot be back ported to previous releases.

Thanks for reporting the problem,

Barry

...

On Apr 11, 2018, at 6:17 PM, Rongliang Chen <[email protected]> wrote:

Dear All,

When I tried to print a long string using PetscPrintf() I found that it truncated the string. Attached is a simple example for this (run with single processor). I used PetscPrintf() and printf() to print the same string and the printf() seems OK. I am using petsc-3.8.4.

Best,

Rongliang

<ex111.c>