diff --git a/lib/imc_channel.hpp b/lib/imc_channel.hpp
index 47873a7..452284b 100644
--- a/lib/imc_channel.hpp
+++ b/lib/imc_channel.hpp
@@ -393,7 +393,6 @@ namespace imc
         ybuffer_offset_ = comp_group1.Cb_.offset_buffer_;
         ybuffer_size_ = comp_group1.Cb_.number_bytes_;
         xstart_ = comp_group1.Cb_.x0_;
-        addtime_ = static_cast<long int>(comp_group1.Cb_.add_time_);
         yfactor_ = comp_group1.CR_.factor_;
         yoffset_ = comp_group1.CR_.offset_;
         yunit_ = comp_group1.CR_.unit_;
@@ -407,6 +406,10 @@ namespace imc
         std::time_t ts = timegm(&comp_group1.NT_.tms_); // std::mktime(&tms);
         trigger_time_ = std::chrono::system_clock::from_time_t(ts);
         trigger_time_frac_secs_ = comp_group1.NT_.trigger_time_frac_secs_;
+        // calculate absolute trigger-time
+        addtime_ = static_cast<long int>(comp_group1.Cb_.add_time_);
+        absolute_trigger_time_ = trigger_time_ + std::chrono::seconds(addtime_);
+        //                                       + std::chrono::nanoseconds((long int)(trigger_time_frac_secs_*1.e9));
       }
       else if ( !chnenv_.compenv1_.uuid_.empty() && !chnenv_.compenv2_.uuid_.empty() )
       {
@@ -438,6 +441,7 @@ namespace imc
         std::time_t ts = timegm(&comp_group2.NT_.tms_); // std::mktime(&tms);
         trigger_time_ = std::chrono::system_clock::from_time_t(ts);
         trigger_time_frac_secs_ = comp_group2.NT_.trigger_time_frac_secs_;
+        absolute_trigger_time_ = trigger_time_;
       }
       else
       {
@@ -447,10 +451,6 @@ namespace imc
       // start converting binary buffer to imc::datatype
       if ( !chnenv_.CSuuid_.empty() ) convert_buffer();
 
-      // calculate absolute trigger-time
-      absolute_trigger_time_ = trigger_time_ + std::chrono::seconds(addtime_);
-      //                                       + std::chrono::nanoseconds((long int)(trigger_time_frac_secs_*1.e9));
-
       // convert any non-UTF-8 codepage to UTF-8
       convert_encoding();
     }
@@ -508,6 +508,8 @@ namespace imc
           throw std::runtime_error("x and y data have different number of values");
         }
 
+        xprec_ = 9;
+
         process_data(xdata_, xnum_values, xdatatp_, xCSbuffer);
         process_data(ydata_, ynum_values, ydatatp_, yCSbuffer);
       }
@@ -624,7 +626,6 @@ namespace imc
         <<std::setw(width)<<std::left<<"significant bits:"<<ysignbits_<<"\n"
         <<std::setw(width)<<std::left<<"buffer-offset:"<<ybuffer_offset_<<"\n"
         <<std::setw(width)<<std::left<<"buffer-size:"<<ybuffer_size_<<"\n"
-        <<std::setw(width)<<std::left<<"add-time:"<<addtime_<<"\n"
         <<std::setw(width)<<std::left<<"xname:"<<xname_<<"\n"
         <<std::setw(width)<<std::left<<"xunit:"<<xunit_<<"\n"
         <<std::setw(width)<<std::left<<"xstepwidth:"<<xstepwidth_<<"\n"
@@ -660,7 +661,6 @@ namespace imc
              <<"\",\"yname\":\""<<prepjsonstr(yname_)
              <<"\",\"yunit\":\""<<prepjsonstr(yunit_)
              <<"\",\"significantbits\":\""<<ysignbits_
-             <<"\",\"addtime\":\""<<addtime_
              <<"\",\"buffer-size\":\""<<ybuffer_size_
              <<"\",\"xname\":\""<<prepjsonstr(xname_)
              <<"\",\"xunit\":\""<<prepjsonstr(xunit_)
diff --git a/lib/imc_object.hpp b/lib/imc_object.hpp
index 0429d31..1fc1a44 100644
--- a/lib/imc_object.hpp
+++ b/lib/imc_object.hpp
@@ -482,7 +482,7 @@ namespace imc
     // construct members by parsing particular parameters from buffer
     void parse(const std::vector<unsigned char>* buffer, const std::vector<parameter>& parameters)
     {
-      if ( parameters.size() < 7 ) throw std::runtime_error("invalid number of parameters in CD2");
+      if ( parameters.size() < 7 ) throw std::runtime_error("invalid number of parameters in NO");
       origin_ = ( get_parameter(buffer,&parameters[2]) == std::string("1") );
       generator_ = get_parameter(buffer,&parameters[4]);
       comment_ = get_parameter(buffer,&parameters[6]);
@@ -508,7 +508,7 @@ namespace imc
     // construct members by parsing particular parameters from buffer
     void parse(const std::vector<unsigned char>* buffer, const std::vector<parameter>& parameters)
     {
-      if ( parameters.size() < 8 ) throw std::runtime_error("invalid number of parameters in CD2");
+      if ( parameters.size() < 8 ) throw std::runtime_error("invalid number of parameters in NT1");
       tms_ = std::tm();
       tms_.tm_mday = std::stoi( get_parameter(buffer,&parameters[2]) );
       tms_.tm_mon = std::stoi( get_parameter(buffer,&parameters[3]) ) - 1;
diff --git a/python/VERSION b/python/VERSION
index 399088b..04b10b4 100644
--- a/python/VERSION
+++ b/python/VERSION
@@ -1 +1 @@
-2.1.6
+2.1.7