Texmaker and TeXstudio ⇒ TeXstudio compiling only ends after closing of external pdf viewer

[Manuel89]

Hello,

I have a slight problem with TeXstudio. If I try to use an external pdf viewer (adobe acrobat or sumatraPDF )the compiling process seems to finish as it is supposed to do. I get the compiled file with looks totally fine. The Problem is that in TeXstudio after the following line:

Process started: "C:/Program Files/SumatraPDF/SumatraPDF.exe" -reuse-instance -forward-search "D:\SeaFile\Dissertation_MKr\Current_Version\Diss_Main_MKr.tex" 7 -fwdsearch-permanent 1 "D:\SeaFile\Dissertation_MKr\Current_Version\Diss_Main_MKr.pdf"

no "Process exited normally" appears until I close the external pdf viewer again. If do not close the external pdf viewer and compile the file again "Process exited with error(s)" appears after the above mentioned text but no error message is visible. If I close the external pdf viewer after this message "Process exited normally" appears below "Process exited with error(s)". It seems to me that the compiling process does not end until the viewer is close but I do not know why this is the case.

I hope somebody can help me with this problem as I have been unable to find an answer with the search function.
Thanks!