In [1]: var_n = parse("NR_003051.3:n.1_2insAGGACGTG")
In [2]: var_g = n_to_g(var_n)
In [3]: var_g
Out[3]: SequenceVariant(ac=NC_000009.12, type=g, posedit=35658020_35658027dup, gene=None)

In [4]: g_to_n(var_g, "NR_003051.3")
---------------------------------------------------------------------------
HGVSInvalidIntervalError                  Traceback (most recent call last)
Cell In[4], line 1
----> 1 g_to_n(var_g, "NR_003051.3")

File ~/localwork/variantgrid/env/lib/python3.12/site-packages/hgvs/assemblymapper.py:115, in AssemblyMapper.g_to_n(self, var_g, tx_ac)
    114 def g_to_n(self, var_g, tx_ac):
--> 115     var_out = super(AssemblyMapper, self).g_to_n(
    116         var_g, tx_ac, alt_aln_method=self.alt_aln_method
    117     )
    118     return self._maybe_normalize(var_out)

File ~/localwork/variantgrid/env/lib/python3.12/site-packages/hgvs/variantmapper.py:166, in VariantMapper.g_to_n(self, var_g, tx_ac, alt_aln_method)
    163     var_g = self.left_normalizer.normalize(var_g)
    165 var_g.fill_ref(self.hdp)
--> 166 pos_n = mapper.g_to_n(var_g.posedit.pos)
    167 if not pos_n.uncertain:
    168     edit_n = self._convert_edit_check_strand(mapper.strand, var_g.posedit.edit)

File ~/localwork/variantgrid/env/lib/python3.12/site-packages/hgvs/alignmentmapper.py:165, in AlignmentMapper.g_to_n(self, g_interval, strict_bounds)
    160 grs, gre = (
    161     g_interval.start.base - 1 - self.gc_offset,
    162     g_interval.end.base - 1 - self.gc_offset,
    163 )
    164 # frs, fre = (f)orward (r)na (s)tart & (e)nd; forward w.r.t. genome
--> 165 frs, frs_offset, frs_cigar = self.cigarmapper.map_ref_to_tgt(
    166     pos=grs, end="start", strict_bounds=strict_bounds
    167 )
    168 fre, fre_offset, fre_cigar = self.cigarmapper.map_ref_to_tgt(
    169     pos=gre, end="end", strict_bounds=strict_bounds
    170 )
    172 if self.strand == -1:

File ~/localwork/variantgrid/env/lib/python3.12/site-packages/hgvs/utils/cigarmapper.py:59, in CIGARMapper.map_ref_to_tgt(self, pos, end, strict_bounds)
     58 def map_ref_to_tgt(self, pos, end, strict_bounds=True):
---> 59     return self._map(
     60         from_pos=self.ref_pos,
     61         to_pos=self.tgt_pos,
     62         pos=pos,
     63         end=end,
     64         strict_bounds=strict_bounds,
     65     )

File ~/localwork/variantgrid/env/lib/python3.12/site-packages/hgvs/utils/cigarmapper.py:83, in CIGARMapper._map(self, from_pos, to_pos, pos, end, strict_bounds)
     77 """Map position between aligned segments
     78 
     79 Positions in this function are 0-based, base-counting.
     80 """
     82 if strict_bounds and (pos < 0 or pos > from_pos[-1]):
---> 83     raise HGVSInvalidIntervalError("Position is beyond the bounds of transcript record")
     85 # find aligned segment to use as basis for mapping
     86 # okay for pos to be before first element or after last
     87 for pos_i in range(len(self.cigar_op)):

HGVSInvalidIntervalError: Position is beyond the bounds of transcript record

exon = hdp.get_tx_exons("NR_003051.3", "NC_000009.12", "splign")[0]
In [5]: exon["alt_start_i"], exon["alt_end_i"]
Out[5]: (35657750, 35658018)